Browse articles
RESEARCH
J Carcinog2005,  4:21

Cancer incidence in the south Asian population of California, 1988-2000


1 California Cancer Registry, Public Health Institute, Fresno; University of California, San Diego, Moores UCSD Cancer Center, Cancer Prevention and Control, La Jolla, California, USA
2 California Cancer Registry, Public Health Institute, Fresno; University of California, San Francisco, Fresno Medical Education Program, Fresno, California, USA
3 California Cancer Registry, Public Health Institute, Sacramento, California, USA

Date of Submission11-Feb-2005
Date of Acceptance10-Nov-2005
Date of Web Publication10-Nov-2005

Correspondence Address:
Ratnali V Jain
California Cancer Registry, Public Health Institute, Fresno; University of California, San Diego, Moores UCSD Cancer Center, Cancer Prevention and Control, La Jolla, California
USA
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.1186/1477-3163-4-21

  Abstract 

Background: Although South Asians (SA) form a large majority of the Asian population of U.S., very little is known about cancer in this immigrant population. SAs comprise people having origins mainly in India, Pakistan, Bangladesh and Sri Lanka. We calculated age-adjusted incidence and time trends of cancer in the SA population of California (state with the largest concentration of SAs) between 1988-2000 and compared these rates to rates in native Asian Indians as well as to those experienced by the Asian/Pacific Islander (API) and White, non-Hispanic population (NHW) population of California.
Methods: Age adjusted incidence rates observed among the SA population of California during the time period 1988-2000 were calculated. To correctly identify the ethnicity of cancer cases, 'Nam Pehchan' (British developed software) was used to identify numerator cases of SA origin from the population-based cancer registry in California (CCR). Denominators were obtained from the U.S. Census Bureau. Incidence rates in SAs were calculated and a time trend analysis was also performed. Comparison data on the API and the NHW population of California were also obtained from CCR and rates from Globocan 2002 were used to determine rates in India.
Results: Between 1988-2000, 5192 cancers were diagnosed in SAs of California.
Compared to rates in native Asian Indians, rates of cancer in SAs in California were higher for all sites except oropharyngeal, oesophageal and cervical cancers. Compared to APIs of California, SA population experienced more cancers of oesophagus, gall bladder, prostate, breast, ovary and uterus, as well as lymphomas, leukemias and multiple myelomas. Compared to NHW population of California, SAs experienced more cancers of the stomach, liver and bile duct, gall bladder, cervix and multiple myelomas. Significantly increasing time trends were observed in colon and breast cancer incidence.
Conclusion: SA population of California experiences unique patterns of cancer incidence most likely associated with acculturation, screening and tobacco habits. There is need for early diagnosis of leading cancers in SA. If necessary steps are not taken to curb the growth of breast, colon and lung cancer, rates in SA will soon approximate those of the NHW population of California.


How to cite this article:
Jain RV, Mills PK, Parikh-Patel A. Cancer incidence in the south Asian population of California, 1988-2000. J Carcinog 2005;4:21

How to cite this URL:
Jain RV, Mills PK, Parikh-Patel A. Cancer incidence in the south Asian population of California, 1988-2000. J Carcinog [serial online] 2005 [cited 2015 Aug 30];4:21. Available from: http://www.carcinogenesis.com/text.asp?2005/4/1/21/42246


  Background Top


The south Asian (SA) population of United States was 1,893,723 in the year 2000 [1], and between 1990 and 2000 this population grew in size by 106%. Persons with origins in India, Pakistan, Bangladesh, and Sri Lanka are classified as SA and they are now the third largest Asian subgroup in the United States, comprising 16% of all U.S. Asians. Approximately 21% of SAs in the U.S. reside in California, the state with the largest concentration of SAs. From 1990 to 2000, the number of SAs living in California increased from 168,457 to 343,731 (104% increase) [2,3]. 90% of SAs are Asian Indian (people with origins in India). In the year 2000 the SA population of California comprised 1.15% of the total population and this proportion is increasing.

There are no published studies on the incidence of cancer among SAs in United States, except for one study which reported breast and colon cancer incidence in Asian Indians and that analysis was based on a very small sample size [4]. Another study by Divan et al. reports the current available literature on this issue and emphasizes the need to conduct more studies on cancer incidence and mortality [5]. The reason for lack of cancer studies in this population may be multiple; including controversy regarding which communities are included under the title 'South Asian', the relatively recent growth of this community in the US, and the belief that SAs are part of a 'model minority' and therefore have better health status than other minority groups. In previous studies all Asians have been grouped into one category, which may mask important differences in incidence and survival among various subgroups.

Most of the cancer studies in SAs residing outside of south Asia have been done in the UK or Canada [6]. Many cancer studies have been conducted in the SA population of UK, mainly because they form the largest ethnic minority of UK. Much attention has been focused on breast and lung cancer epidemiology [7-11]. Studies focusing on multiple cancer sites are few [11,12] although some attention has been given to childhood cancers, mainly because childhood cancers are increasing with time [13-16].

Initial studies suggested that English SA rates for all sites combined were lower than the non-SA rates but higher than Indian subcontinent rates (especially for lung cancer in males, breast cancer in females, and lymphomas in both sexes). But a sub-site analysis revealed that, English South Asian rates were significantly higher than the non-SA rates for Hodgkins disease in males, and oral, esophageal, thyroid, leukemias in females, and cancers of the pharynx, liver and gall bladder in both sexes [12].

Recent studies in UK indicate, that younger SA, particularly children are at increased risk of cancer than the non-SA population and although generally cancer rates have fallen over the last decade, they are increasing among SAs [11].

Studies on cancer in the SA population of Canada pertain primarily to cancer screening, and no studies on cancer incidence have been reported [17,18].

Studies of cancer incidence in immigrant populations can provide valuable insights into etiology and changes towards the pattern of disease seen in the host country may indicate environmental factors in etiology [19]. Therefore, in this analysis we have calculated age adjusted rates for cancer in the SA population of California and compared these rates to native Asian Indians (people living in India) as well as the Asian/Pacific Islander (Asian/PI) and non-Hispanic White (NHW) populations of California in the same time period. We also conducted a time trend analysis to study the patterns of cancer incidence in this population for the period 1988-2000. Where appropriate, we have also compared these rates to those reported in Great Britain.


  Methods Top


The California Cancer Registry (CCR), a population-based registry, commenced operation in 1988. The methodology of the CCR has been fully described by Morris et al. [20]. The CCR collects information on all cancers except for non-melanoma skin cancers and in situ cancers of the uterine cervix. Information on several demographic variables, diagnostic variables (including stage at diagnosis, tumor size, histology and grade of tumor), and first course of treatment are collected for all cases. Cases are routinely coded with regard to anatomic stage of disease using the general summary stage schema for 1988-1993 [20], and SEER extent of disease for 1994-1997 [21]. Race and ethnicity are categorized into four mutually exclusive groups in the CCR database: White, non-Hispanic, Black, non-Hispanic, Hispanic, and Asian/Pacific Islander. Under the last category there are further breakdowns for several Asian ethnic groups, including the category 'Asian Indian/Pakistani', which includes people of SA origin.

Our analysis included cancer cases diagnosed during the period 1988-2000. Incidence rates were calculated for this population for all major sites and several specific cancer types. Due to small numbers for some of the cancer sites, the rates for individual years were grouped into three-year categories to reduce the instability of rates. In addition, an age-adjusted trend analysis of the rates was completed for the period 1988-2000 to determine the Annual Percentage Change (APC) (using the non-weighted least squares approach) along with p-values for APCs.

Ethnic Classification

The SA group is heterogeneous, not only in national origin, sub-ethnicity (and therefore heritable features), and religion, but also in specific details of pertinent lifestyle including alcohol, tobacco, and various levels of vegetarianism. Secondly, individual hospitals, from where most cancer cases are identified by the CCR, do not have the resources to correctly categorize race/ethnicity. Hence many SA cancer patients may be classified as "Asian, not otherwise specified" by the hospital.

Due to the above situation, a British developed software program called 'Nam Pehchan' [22] (literally means name identification in Hindi) was used in this study in order to address the issue of misclassification of race/ethnicity. This software is a computer program for the identification of names, which originate in the Indian subcontinent and Sri Lanka, which collectively we call here "South Asia". It provides a reasonably accurate way of identifying people belonging to "South Asian" and "Other" ethnic groups. It also identifies the religious and linguistic origins of the names where possible. Both surnames and forenames can be matched against the program's stored lists. Given the possibility that different elements of a name may meet with varying recognition from the lookup table, the final result is not simply "South Asian" or "not South Asian", but rather a numeric code indicating the outcome of the search and match process. Knowing the limitations of this program [23], we used this software program, as well as birthplace and a visual case-by-case review to correctly identify approximately 5,200 cancer cases of SA origin, from the 106, 653 Asian/Pacific Islander cancer database at CCR, 1988-2000. We identified 30% more SA cases as compared to CCR (CCR identified approximately 4000 SA cases in the same time period).

Calculation of incidence rates

Numerators, comprised of all newly diagnosed cancer cases, were derived by applying the Nam Pehchan software to all cancer cases classified as Asian/Pacific Islander by the CCR, 1988-2000. The numerators were coupled with age, gender and yearly specific denominator data for the SA population in California (population counts) obtained from the U.S. Census Bureau. Detailed population counts and demographic characteristics for SA subgroups for both the 1990 and 2000 decennial census are available from the US Census Bureau [2,24]. Electronic population data by age and sex for all SA subgroups were identified and obtained. Hard copy population data for the California 1990 SA subgroups were also identified and key-entered and are available at the cancer registry. Using these census data sets, interpolation between the two decennial censuses was completed and extrapolation back to the years 1988 and 1989 was completed to create the best estimates of the SA subgroups at risk on an age and sex specific basis. The interpolation and extrapolation was done assuming a linear growth in the SA population subgroups. Finally, the subgroup estimates were combined on an age and sex specific basis for each individual year from 1988-2000 to form one SA population group for each individual year. Using these data age-specific and age-adjusted cancer incidence rates were calculated for the time period 1988-2000. We used the 2000 U.S (5-year groups) population as the standard population.

For purpose of comparison between cancer rates in native Asian Indians (living in India) and SAs in California, we calculated Age Standardized Rates (ASRs), using the world standard for the California SAs and compared them to ASRs in India, obtained from the Globocan 2002 [25]. Globocan is a publication of the International Association of Research for Cancer (IARC), and rates for India are for the time period 1993-1997, and cover eight regional registries in India. We used rates from India as our comparison parameter, as 90% of SAs in the U.S. are of Asian Indian origin. In addition, we calculated incidence rate ratios (IRRs) by taking a ratio of California SA ASRs and Indian ASRs, calculated Confidence Intervals (CIs) and determined the significance [26].

Grouped analysis

Rates for the period of 1988-2000 were divided into 4 time periods by grouping the years of diagnosis into four categories, namely 1988-1991, 1992-1994, 1995-1997 and 1998-2000. Incidence rates were calculated for each of these time periods. We also compared these rates to the Asian/PIs as well as the NHW population of California for the same time periods.

Time Trend analysis

We performed a time trend analysis for each of the cancer sites separately for males and for females, using the 'age-adjusted trend analysis' feature of SEER-STAT [27]. For this purpose, we used the annual data versus the categorized grouped data. We calculated the Annual Percentage Change (APC) (identifies the percent change by computing the slope of the best-fitting regression line around the data points-rates for each individual years in this case) and p-values for APCs.


  Results Top


In total, 5192 cases of cancer were diagnosed in SA population of California between 1988-2000, including 2411 males, and 2781 females. The median age at diagnosis of cancer was 63 years in males and 54 years in females. A comparison of overall age-adjusted invasive cancer incidence rates for the three ethnic groups revealed that the SA average annual incidence rate was 307.5/100,000, compared to 325.2/100,000 for Asian/PI and 489.1/100,000 for NHW [Figure 1]. In the recent years the overall invasive cancer rates for California SAs have been higher than those of the Asian/PIs of the state.

[Table 1] summarizes the cancer counts by major cancer sites and [Figure 2] and [Figure 3] show the top five leading cancers and their trends in the SA males and females respectively. Leading cancers in SA males include prostate, colorectal, urinary system, lung and bronchus, and lymphomas. The leading cancer in SA females is breast cancer followed by colorectal, uterine, ovarian and cervical cancer. In this section we have categorized cancers into two groups namely; common cancers (cancers common to males and females) and gender specific cancers (reproductive organ cancers).

Comparison of cancer incidence between California SAs and native Asian Indians

Age standardized rates for California SAs and those for India as well as Incidence Rate Ratios (with statistical significance) are presented in [Table 2]. IRR of more than one indicates that California SAs are at higher risk of developing that particular cancer than the native Asian Indians. Overall, California SA males and females are at double risk for developing cancer than native Asian Indians.

Common cancers

California SAs were at lower risk of oropharyngeal and esophageal cancers than the native Asian Indian population, which occur very commonly in India. The California SA population was at higher risk for gastrointestinal cancers (namely colorectal, hepatic, and pancreatic cancers). They were also at higher risk for hematopoietic and lymphoreticular and endocrine malignancies. The SA population of California also experienced a higher risk for other organ systems such as, urinary system and brain & CNS cancers.

Gender specific cancers

SA men experienced 15 fold risk of prostate cancer than the native Asian Indian population. California SA females experienced higher risk of all reproductive organ cancers except cervical cancer.

Comparison of incidence rates between SAs and Asian/PIs of the state of California

Incidence rates and time rends between 1988-2000, for California SAs as well as the Asian/PI and NHW population are presented in [Table 3] and [Table 4].

Common cancers

In general, the SA population of California experienced more brain & CNS cancers, hematopoietic and lymphoreticular cancers than the Asian/PI population of the state. SA females also experienced higher oropharyngeal, esophageal and gall bladder cancer than the Asian/PI women of California. As regards to other cancer sites, the SA population of California was at equal or lower risk than the Asian/PIs of the state.

Gender-specific cancers

SA males experienced more prostate cancer than the Asian/PI males and SA females experienced more reproductive organ cancers than the Asian/PI women, except for cervical cancer.

Comparison of SA rates with NHWs of the state

Common cancers

The SA population of California experienced more Gastro Intestinal cancers (mainly hepatic, gall bladder and stomach cancers) and myelomas than the NHW population of the state. SA females experienced more oropharyngeal and esophageal cancers than the NHW women. SA males experienced recent increase in leukemia incidence as compared to the NHW males.

Gender specific cancers

As far as the reproductive cancers are concerned, the SA population was at lower risk of these cancers than the NHW population of the state, except for cervical cancer.

Trends over time

Overall, SA males experienced a decreasing trend of all cancers combined, over the time period of 1988-2000 (APC = -1, p = 0.2), while SA females experienced an increasing trend (APC = 0.9, p = 0.4). [Table 5], shows the APCs and their p-values for each individual cancer in the SA population.

Common cancers

The SA population of California experienced a significantly decreasing trend of oropharyngeal cancers. On the other hand they experienced an increasing trend of hepatic and renal cancers. In addition, SA males experienced an increasing trend of hematopoietic & lymphoreticular cancers (NHL, multiple myelomas, leukemias) and brain & other CNS cancers. SA females experienced an increasing trend of gastrointestinal cancers (esophageal colon, hepatic, and stomach), lung and thyroid cancers.

Gender-specific cancers

As far as the reproductive organs were concerned, SA females experienced an increasing trend of breast and uterine cancers. All other sites experienced either a decreasing or steady trend over time.


  Discussion Top


The present study reveals several unique cancer patterns among SAs in California. Firstly, the median age at diagnosis of cancer in this population is 58 years compared to 68 years for all other races [28]. Secondly, the most common cancers in the Indian subcontinent are not the most common cancers in SAs of California. The most common cancers among men in India are oral cavity and pharynx, lung, esophagus, laryngeal and stomach cancers [25]. In India, cervical cancer is most common in women, followed by breast, oral cavity, esophagus and ovarian cancer [25]. In India about half the cases among men and one-fifth cases among women are in cancer sites affected by tobacco use (tobacco smoking as well as tobacco chewing) [29], which was not seen in SAs of California.

Common cancers (cancers common to both males and females)

Oropharyngeal cancers

Our findings indicate that California SAs are at lower risk of oral and esophageal cancers than the native Asian Indians. This directly reflects the general tendency of the SA immigrants to avoid use of tobacco products (especially chewing 'paan' (tobacco rolled up in betel nut leaves) and smoking 'bidi' (cigarette made out of tobacco leaves, with no filters) in a foreign country. Besides, majority of SA immigrants in California tend to be educated and do not have such habits even in South Asia.

Esophagus cancer

Esophageal cancer is increasing in SA females and is higher than both NHW and Asian/PI females. Such findings of increasing trend are not seen in the SA males. This finding also seems contradictory to the general decreasing trend of oropharyngeal cancers, as esophageal and oropharyngeal cancers share similar etiologies. The etiology of esophageal cancer is mainly associated with consumption of tobacco (smoking or smokeless) and alcohol. In addition Barrett's esophagus, diet and nutrition, reflux disease also play an important role in etiology of esophageal cancer [30,31]. There are no published studies about smoking/tobacco/alcohol use prevalence in the SA population in the U.S. Because of lack of such data we cannot correlate our findings with the smoking prevalence. The rise of esophageal cancer in California SA females as well as histological subtype evaluation of this cancer is needed.

Stomach cancer

IRRs suggest that California SA females are at a higher risk for stomach cancer than native Asian Indian females, but this is not true for males. The time trend analysis suggests that male stomach cancer is decreasing, but female stomach cancer is on the rise. Infections with  Helicobacter pylori Scientific Name Search etic predisposition of host have been suggested to be the most important causes of stomach cancer in general population [32,33].

Cancers of the liver and intrahepatic bile duct

These cancers are of common occurrence in Asians. HBV (hepatitis B virus) infection, with and without aflatoxin exposure, and alcoholic liver cirrhosis are responsible for most cases of hepatocellular cancer in developing countries [34]. There is widespread contamination of foods with aflatoxin and moderately high prevalence of HBV and hepatitis C (HCV) virus-related chronic liver disease in India [35]. IRRs suggest that California SA population is at higher risk (more than two-fold) of hepatic cancers than native Asian Indians. Our findings are similar to the studies done in the past in UK on migrants of Indian ethnicity as well as British ethnicity, to the UK [16,36].

Gall bladder cancer

The major causative factors for gall bladder cancer include gallstones and genetic susceptibility, and liver flukes in Asian countries have also been suggested to be causative [37]. In one study done in India, the prevalence of gallstones in adult population was 6.12% (3.07% in males, 9.6% in females) [38]. All these above stated factors could explain our finding of much higher rates in the SA population than Asian/PI or NHW population. Similar findings have been reported by studies in SA immigrants to the UK [12, 36, 39]. Nevertheless, it is encouraging that there is a significantly decreasing trend of this cancer in California SAs.

Colon and rectal cancer

Both SA males and females of California experienced more than four-fold risk of developing this cancer compared to the native Asian Indian population. Studies in the general population estimate that 13% of this cancer can be attributed to being physically inactive, 12% to eating a Western style diet, and 8% to having a first degree relative with colorectal cancer [40]. The diet of Asian Indians in the United States has changed from one featuring low-fat, high-fiber foods to one characterized by higher-fat animal protein, low fiber, and high levels of saturated fat. There is an increased tendency among Asian Indians in America to consume fast foods and convenience foods [41]. The significantly rising trend of colon cancers seen in SA females, which is otherwise a low-risk population, may be related to migration and subsequent acculturation and adoption of Western diet and lifestyle.

Lung and bronchus cancers

As compared to the native Asian Indian rates, the SAs of California are at higher risk for this cancer. The five-fold risk in California SA females as compared to the native Asian Indian females and an increasing trend is noteworthy. A decreasing trend of lung cancer in SA males is not in concordance with a recent study done in the UK SA population, which reports recent increase in incidence of lung cancer in both SA men as well as women [7].

Non-Hodgkin's Lymphomas (NHL)

IRRs suggest that the California SAs are at a much higher risk (3-6 fold higher risk) of developing NHL than native Asian Indians. In addition, an increasing trend of NHL has been observed in the SA population of California. While the incidence of NHL has doubled in the U.S., etiology of lymphomas remains elusive. Epidemiological studies suggest the role of hereditary factors, immunosuppression, viruses (HIV, EBV, HTLV, H.pylori, HHV8, HCV), chemical and agricultural exposures and other factors in the etiology of NHL [42]. Recent studies have also associated menstrual and reproductive factors (higher parity and early menarche offer a protective effect for NHL) with risk of NHL [43,44]. Lack of immune stimulation/challenge ('hygiene hypothesis') [45] and acculturation could explain the higher risk seen in this population.

Leukemias

Three-fold higher risk of developing leukemias in California SAs as compared to the native Asian Indians, and a rising trend of this cancer over time shows similarity with results from UK SA studies [14, 16, 19]. Types of leukemias and their causes vary widely and are age dependant. Further investigation, especially age specific and leukemia subtype analysis is needed into this finding.

Multiple myelomas

IRRs suggest that California SA population experience a much higher risk (four-five fold) of developing myelomas than the native Asian Indians, as well as higher rates than the Asian/PI or NHW population of California. Risk factors for multiple myelomas include, monoclonal gammopathy of unknown significance, chronic immune stimulation (as in infections with tuberculosis, malaria, hepatitis, etc.), autoimmune disorders, and occupational exposures [46]. Every year, approximately two million persons in India develop tuberculosis, and incidence of malaria is 2-3 million cases per year [47,48]. Exposure to these chronic diseases before migration could explain the high rates of myelomas seen in California SAs.

Findings of elevated risk of haematopoietic and lymphoreticular malignancies (lymphomas, leukemias and myelomas) in SAs after migration needs further investigation. Similar results have been reported in SA immigrants of UK [12, 16, 36].

Thyroid cancer

IRRs indicate that California SA females are four times more likely to get thyroid cancer than Indian females; this is not true in males. The incidence of congenital hypothyroidism and prevalence of goiter in India is much higher than the worldwide average [49]. A large fraction of the Indian population suffers from iodine deficiency disorders [50]. The major etiological factors for thyroid cancers have been iodine deficiency and ionizing radiation [51-53]. We cannot explain the higher IRR observed in California SA females.

Brain and other nervous system cancers

California SAs experienced higher IRRs of these malignancies as compared to native Asian Indians. SA males experience higher rates of these malignancies than the Asian/PIs and SA females recently experienced higher rates than Asian/PIs as well as NHWs. This finding is not in concordance with the other studies done in the UK SA population [14,16]. These cancers are infrequent in India and frequent amongst the U.S. Whites, making the SA population a low-risk population [54,55]. In spite of being a low-risk population, higher IRRs and rates of these cancers observed in SAs need further investigation.

Gender-specific cancers

Prostate cancer

Prostate cancer is the most common cancer in SA males and has increased from 1988-2000. California SA males experienced fifteen fold-increased risk of this cancer as compared to Indian males. Also, rates are higher in California SA males than in Asian/PIs of California. Epidemiological studies suggest that endogenous risk factors like family history, androgens, race, aging, oxidative stress and exogenous factors including diet and environmental agents have been associated with this cancer [56]. Other studies suggest that screening for this cancer has dramatically increased the number of men with local disease at diagnosis [57]. The fifteen-fold risk of prostate cancer in this population as compared to the native Asian Indians could be explained by early detection (measurement of serum PSA), rather than true differences in underlying risk. The other factors explaining this difference could be lead-time, case identification, detection and reporting biases.

Breast cancer

Breast cancer is the number one cancer in the California SA females and they are 3.5 times more likely to develop this cancer as compared to native Asian Indian females. Our time-trend analysis suggests that, although in situ breat cancer diagnosis has significantly increased, invasive breast cancer diagnosis has increased alarmingly more in SA than in Asian/PIs and NHWs. In the general population major risk factors include, late maternal age at first parity (>30 years of age), having one child vs. 4, use of oral contraceptives (OCs), use of hormone replacement therapy (HRT), obesity and alcohol [58-60]. Adoption of above-mentioned lifestyle practices by SA women and inadequate screening could be related to the increase in breast cancer in this population.

Cervical Cancer

Although HPV has been proposed as the first identified necessary cause of cervical cancer [61,62], we attribute the decreasing trend and very low IRRs of cervical cancer in California SA women to screening success. California SA women are getting screened at very early stages and hence treated completely as compared to the Indian women (cervical cancer ranks number one in India).

Ovarian and uterine cancers

Risk factors for epithelial ovarian cancer include older age, being White, positive family history, nulliparity, infertility, and obesity (high saturated fat and carbohydrate intake), postmenopausal HRT and use of cosmetic talc. Conversely, preventive factors include OC use, vegetable consumption, gravidity, lactation, tubal ligation, and hysterectomy. Genetic influence also plays a role, women with mutations in the BRCA1 or BRCA2 genes having an elevated risk [63-65]. Rates of this cancer in the SA women are higher than the ASIAN/PIs and almost approximating those of NHWs. Almost two-fold elevated risk of ovarian cancer in California SA women compared to native Asian Indian women can be explained by all the adoption of above mentioned western life-style factors.

Similarly uterine/endometrial cancer is a disease of the developed world. Epidemiological studies have shown that majority of the incidence can be attributed to excess body weight (in turn due to 'unopposed estrogens'), lack of physical activity, exogenous hormones and chronic hyperinsulinemia along with genetic predisposition [66,67]. California SA women face a five-fold risk of this cancer as compared to the native Asian Indians and they show much higher rates than the Asian/PIs and their rates seem to be fast approaching the NHWs of the state. Clearly, acculturation can explain these findings.

Limitations

Certain limitations in the methods employed in this study deserve comment. The assumption of a linear growth of population may not be completely tenable, and various factors such as birth/death rates and immigration/migration related issues could impact patterns of population growth. However, communication with staff at the Los Angeles County Cancer Surveillance program indicated that interpolation performed well when compared to more complex methods of estimation based on year/race/ethnicity/sex and county specific population estimates obtained from the California Department of Finance (state agency in California charged with maintaining intercensal population figures) (personal communication, Dr. Lihua Liu, USC/CSP, December, 2003).

While performing incidence studies on sub-ethnic populations, the issue of small number of cases is inevitable. This could create instability of rates, especially in analyses pertaining to trends over time. To overcome this, forming groups and performing a grouped analysis in those groups was completed.


  Conclusion Top


Our findings are in general agreement with studies completed in the UK and suggest a strong role for acculturation, screening and lifestyle factors in explaining the patterns of cancer in SA in California. Minor disagreements with findings in UK studies are to be expected, as there are minor underlying differences in methodology. For example, some studies have used absolute numbers for comparison or a proportionate approach for comparison. But most of the studies have reported incidence rates based on data available from the cancer registries and census bureaus/corresponding organizations in UK (with whom we have compared our data).

More studies are needed to evaluate gender differences in this population, especially the rising trend of gastrointestinal cancers seen in SA females vs. males, needs more investigation. Our study also reveals the need for additional screening measures and early diagnosis in this population. Our overall impression is that, if measures are not taken to improve screening, and curb smoking in this population and if the current conditions prevail, the rates of colon, lung, and breast cancer in the SA population will approximate those of California NHWs.

We have presented a general picture of cancer in the SA population in this paper. It is beyond the scope of this paper to discuss subtypes of each cancer. Hence we conclude that more studies are needed on this issue and subtype analysis of cancer sites needs to be conducted.


  List of Abbreviations used Top


SA: south Asian

NHW: non-Hispanic White

API: Asian/Pacific Islanders

APC: Annual percentage change

CCR: California Cancer Registry


  Authors' contributions Top


RVJ conceptualized and designed the study, as well as carried out the data analysis and prepared the manuscript. PKM was responsible for the study design, acquisition of funding and data, as well as interpretation of the data. APP helped prepare the manuscript and gave technical advice.

 
  References Top

1.U.S. Census Bureau. The Asian Population by detailed group: 2000   Back to cited text no. 1
    
2.1990 Census of Population: General Population Characteristics, California   Back to cited text no. 2
    
3.U.S. Census Bureau. Public Use Presentation Library:The Asian Population: 2000 (September 2002)   Back to cited text no. 3
    
4.Blesch KS, Davis F, Kamath SK: A comparison of breast and colon cancer incidence rates among native Asian Indians, US immigrant Asian Indians, and whites. J Am Diet Assoc 1999, 99: 1275-1277.   Back to cited text no. 4
    
5.Divan HA: Cancer incidence and mortality in Asian Indians: a review of literature from the United States, South Asia, and beyond. Asian Am Pac Isl J Health 2003, 10: 73-85.   Back to cited text no. 5
    
6.Islam N, Zojwalla N: Cancer. A Brown Paper: The Health of South Asians in the United States SAPHA, October 2002   Back to cited text no. 6
    
7.Smith LK, Peake MD, Botha JL: Recent changes in lung cancer incidence for south Asians: a population based register study. Bmj 2003, 326: 81-82.   Back to cited text no. 7
    
8.Velikova G, Booth L, Johnston C, Forman D, Selby P: Breast cancer outcomes in South Asian population of West Yorkshire. Br J Cancer 2004, 90: 1926-1932.   Back to cited text no. 8
    
9.dos Santos Silva I, Mangtani P, De Stavola BL, Bell J, Quinn M, Mayer D: Survival from breast cancer among South Asian and non-South Asian women resident in South East England. Br J Cancer 2003, 89: 508-512.   Back to cited text no. 9
    
10.Farooq S, Coleman MP: Breast cancer survival in South Asian women in England and Wales. J Epidemiol Community Health 2005, 59: 402-406.   Back to cited text no. 10
    
11.Smith LK, Botha JL, Benghiat A, Steward WP: Latest trends in cancer incidence among UK South Asians in Leicester. Br J Cancer 2003, 89: 70-73.   Back to cited text no. 11
    
12.Winter H, Cheng KK, Cummins C, Maric R, Silcocks P, Varghese C: Cancer incidence in the south Asian population of England (1990-92). Br J Cancer 1999, 79: 645-654.   Back to cited text no. 12
    
13.Flavell KJ, Biddulph JP, Powell JE, Parkes SE, Redfern D, Weinreb M, Nelson P, Mann JR, Young LS, Murray PG: South Asian ethnicity and material deprivation increase the risk of Epstein-Barr virus infection in childhood Hodgkin's disease. Br J Cancer 2001, 85: 350-356.   Back to cited text no. 13
    
14.McKinney PA, Feltbower RG, Parslow RC, Lewis IJ, Glaser AW, Kinsey SE: Patterns of childhood cancer by ethnic group in Bradford, UK 1974-1997. Eur J Cancer 2003, 39: 92-97.   Back to cited text no. 14
    
15.McKinney PA, Feltbower RG, Parslow RC, Lewis IJ, Picton S, Kinsey SE, Bailey CC: Survival from childhood cancer in Yorkshire, U.K.: effect of ethnicity and socio-economic status. Eur J Cancer 1999, 35: 1816-1823.   Back to cited text no. 15
    
16.Cummins C, Winter H, Maric R, Cheng KK, Silcocks P, Varghese C, Batlle G: Childhood cancer in the south Asian population of England (1990-1992). Br J Cancer 2001, 84: 1215-1218.   Back to cited text no. 16
    
17.Ahmad F, Cameron JI, Stewart DE: A tailored intervention to promote breast cancer screening among South Asian immigrant women. Soc Sci Med 2005, 60: 575-586.   Back to cited text no. 17
    
18.Ahmad F, Stewart DE: Predictors of clinical breast examination among South Asian immigrant women. J Immigr Health 2004, 6: 119-126.   Back to cited text no. 18
    
19.Powell JE, Parkes SE, Cameron AH, Mann JR: Is the risk of cancer increased in Asians living in the UK? Arch Dis Child 1994, 71: 398-403.   Back to cited text no. 19
    
20.Morris C, Cohen R, Perkins C, Allen M, Kwong S, Schlag R, Wright W: Cancer in California, 1988-1996. Sacramento, CA, California Health Department Of Health Services, Cancer Surveillance Section; 1999.   Back to cited text no. 20
    
21.Surveillance, Epidemiology, and End Results Program (1992). SEER Extent of Disease -1988 Coding Instructions, Second Edition. Bethesda, MD: National Cancer Institute NIH Pub No 92-2313   Back to cited text no. 21
    
22. Nam Pehchan Version 2.1 edition. Bradford, City of Bradford Metropolitan District Council and Bradford Health Authority; 2002.   Back to cited text no. 22
    
23.Cummins C, Winter H, Cheng KK, Maric R, Silcocks P, Varghese C: An assessment of the Nam Pehchan computer program for the identification of names of south Asian ethnic origin. J Public Health Med 1999, 21: 401-406.   Back to cited text no. 23
    
24.United States Census Bureau, Census 2000   Back to cited text no. 24
    
25.Ferlay J, Bray F, Pisani P, Parkin DM: GLOBOCAN 2002: Cancer Incidence, Mortality and Prevalence Worldwide.   Back to cited text no. 25
    
26.Breslow NE, Day NE: Statistical methods in cancer research. Volume II--The design and analysis of cohort studies. IARC Sci Publ 1987, 1-406.   Back to cited text no. 26
    
27.Surveillance Research Program, National Cancer Institute SEER*Stat software Version 5.3.1   Back to cited text no. 27
    
28.Kwong S, Perkins CI, Morris CR, Cohen R, Allen M, Schlag R, Wright WE: Cancer in California: 1988-1998. Sacramento, California Health Department of Health Services, Cancer Surveillance Section; 2000.   Back to cited text no. 28
    
29.Gajalakshmi V, Shanta V, Swaminathan R: Cancer Registration in India. Asian Pacific J Cancer Prev, 2, IACR Supplement, 13-20   Back to cited text no. 29
    
30.Blot WJ, McLaughlin JK, Devesa SS, Fraumeni JF Jr: Cancers of the oral cavity and pharynx. In Cancer Epidemiology and Prevention Second edition. Edited by: Schottenfeld D, Fraumeni JF Jr. 1995, 666-680.   Back to cited text no. 30
    
31.Enzinger PC, Mayer RJ: Esophageal cancer. N Engl J Med 2003, 349: 2241-2252.   Back to cited text no. 31
    
32.Correa P: The biological model of gastric carcinogenesis. IARC Sci Publ 2004, 301-310.   Back to cited text no. 32
    
33.Nardone G, Morgner A: Helicobacter pylori and gastric malignancies. Helicobacter 2003, 8 Suppl 1: 44-52.   Back to cited text no. 33
    
34.El-Serag HB: Hepatocellular carcinoma: an epidemiologic view. J Clin Gastroenterol 2002, 35: S72-8.   Back to cited text no. 34
    
35.Dhir V, Mohandas KM: Epidemiology of digestive tract cancers in India. III. Liver. Indian J Gastroenterol 1998, 17: 100-103.   Back to cited text no. 35
    
36.Swerdlow AJ, Marmot MG, Grulich AE, Head J: Cancer mortality in Indian and British ethnic immigrants from the Indian subcontinent to England and Wales. Br J Cancer 1995, 72: 1312-1319.   Back to cited text no. 36
    
37.Fraumeni JF Jr, Devesa SS, McLaughlin JK, Stanford JL: Biliary tract cancer. In Cancer Epidemiology and Prevention Second edition. Edited by: Schottenfeld D, Fraumeni JF Jr. 1995, 794-805.   Back to cited text no. 37
    
38.Khuroo MS, Mahajan R, Zargar SA, Javid G, Sapru S: Prevalence of biliary tract disease in India: a sonographic study in adult population in Kashmir. Gut 1989, 30: 201-205.   Back to cited text no. 38
    
39.Barker RM, Baker MR: Incidence of cancer in Bradford Asians. J Epidemiol Community Health 1990, 44: 125-129.   Back to cited text no. 39
    
40.Slattery ML: Diet, lifestyle, and colon cancer. Semin Gastrointest Dis 2000, 11: 142-146.   Back to cited text no. 40
    
41.Kulkarni KD: Food, culture, and diabetes in the United States. Clinical Diabetes 2004, 22: 190-192.   Back to cited text no. 41
    
42.Fisher SG, Fisher RI: The epidemiology of non-Hodgkin's lymphoma. Oncogene 2004, 23: 6524-6534.   Back to cited text no. 42
    
43.Nelson RA, Levine AM, Bernstein L: Reproductive factors and risk of intermediate- or high-grade B-Cell non-Hodgkin's lymphoma in women. J Clin Oncol 2001, 19: 1381-1387.   Back to cited text no. 43
    
44.Zhang Y, Holford TR, Leaderer B, Boyle P, Zahm SH, Zhang B, Zou K, Morton LM, Owens PH, Flynn S, Tallini G, Zheng T: Menstrual and reproductive factors and risk of non-Hodgkin's lymphoma among Connecticut women. Am J Epidemiol 2004, 160: 766-773.   Back to cited text no. 44
    
45.Vijh AK: Inverse trend between estimated worldwide frequency of major cancers and inferred infectious burdens of populations: possible role of adaptive immune system. Med Hypotheses 2004, 62: 880-888.   Back to cited text no. 45
    
46.Herrington LJ, Weiss NS, Olshan AF: Multiple myeloma. In Cancer Epidemiology and Prevention Second edition. Edited by: Schottenfeld D, Fraumeni JF Jr. 1995, 946-970.   Back to cited text no. 46
    
47.Lal S, Dhillon GP, Aggarwal CS: Epidemiology and control of malaria. Indian J Pediatr 1999, 66: 547-554.   Back to cited text no. 47
    
48.Progress toward tuberculosis control--India, 2001 MMWR Morb Mortal Wkly Rep 2002, 51: 229-232.   Back to cited text no. 48
    
49.Desai MP: Disorders of thyroid gland in India. Indian J Pediatr 1997, 64: 11-20.   Back to cited text no. 49
    
50.Sood A, Pandav CS, Anand K, Sankar R, Karmarkar MG: Relevance and importance of universal salt iodization in India. Natl Med J India 1997, 10: 290-293.   Back to cited text no. 50
    
51.Przybylik-Mazurek E, Szybinski Z: [Biological risk factors for differentiated thyroid cancer]. Wiad Lek 2001, 54 Suppl 1: 157-162.   Back to cited text no. 51
    
52.Szybinski Z, Huszno B, Rachtan J, Przybylik-Mazurek E, Buziak-Bereza M, Trofimiuk M: [Epidemiology of thyroid cancer in Poland]. Wiad Lek 2001, 54 Suppl 1: 106-116.   Back to cited text no. 52
    
53.Lawal O, Agbakwuru A, Olayinka OS, Adelusola K: Thyroid malignancy in endemic nodular goitres: prevalence, pattern and treatment. Eur J Surg Oncol 2001, 27: 157-161.   Back to cited text no. 53
    
54.Preston-Martin S: Descriptive epidemiology of primary tumors of the brain, cranial nerves and cranial meninges in Los Angeles County. Neuroepidemiology 1989, 8: 283-295.   Back to cited text no. 54
    
55.Preston-Martin S, Mack W.J: Neoplasms of the nervous system. In Cancer Epidemiology and Prevention Second edition. Edited by: Schottenfeld D, Fraumeni JF Jr. 1995, 1231-1281.   Back to cited text no. 55
    
56.Bostwick DG, Burke HB, Djakiew D, Euling S, Ho SM, Landolph J, Morrison H, Sonawane B, Shifflett T, Waters DJ, Timms B: Human prostate cancer risk factors. Cancer 2004, 101: 2371-2490.   Back to cited text no. 56
    
57.Brawley OW, Knopf K, Merrill R: The epidemiology of prostate cancer part I: descriptive epidemiology. Semin Urol Oncol 1998, 16: 187-192.   Back to cited text no. 57
    
58.Vatten L: [Female sex hormones increase the risk of breast cancer]. Tidsskr Nor Laegeforen 1998, 118: 2969-2974.   Back to cited text no. 58
    
59.Wenten M, Gilliland FD, Baumgartner K, Samet JM: Associations of weight, weight change, and body mass with breast cancer risk in Hispanic and non-Hispanic white women. Ann Epidemiol 2002, 12: 435-434.   Back to cited text no. 59
    
60.Singletary KW, Gapstur SM: Alcohol and breast cancer: review of epidemiologic and experimental evidence and potential mechanisms. JAMA 2001, 286: 2143-2151.   Back to cited text no. 60
    
61.Liu T, Wang X, Waterbor JW, Weiss HL, Soong SJ: Relationships between socioeconomic status and race-specific cervical cancer incidence in the United States, 1973-1992. J Health Care Poor Underserved 1998, 9: 420-432.   Back to cited text no. 61
    
62.Bosch FX, de Sanjose S: Human papillomavirus in cervical cancer. Curr Oncol Rep 2002, 4: 175-183.   Back to cited text no. 62
    
63.Sagae S, Mori M: [Ovarian cancer]. Gan To Kagaku Ryoho 2001, 28: 179-183.   Back to cited text no. 63
    
64.Sagae S, Mori M, Moore MA: Risk Factors for Ovarian Cancers: Do Subtypes Require Separate Treatment in Epidemiological Studies? Asian Pac J Cancer Prev 2002, 3: 5-16.   Back to cited text no. 64
    
65.Goodman MT, Howe HL: Descriptive epidemiology of ovarian cancer in the United States, 1992-1997. Cancer 2003, 97: 2615-2630.   Back to cited text no. 65
    
66.Akhmedkhanov A, Zeleniuch-Jacquotte A, Toniolo P: Role of exogenous and endogenous hormones in endometrial cancer: review of the evidence and research perspectives. Ann N Y Acad Sci 2001, 943: 296-315.   Back to cited text no. 66
    
67.Kaaks R, Lukanova A, Kurzer MS: Obesity, endogenous hormones, and endometrial cancer risk: a synthetic review. Cancer Epidemiol Biomarkers Prev 2002, 11: 1531-1543.   Back to cited text no. 67
    


    Figures

  [Figure 1], [Figure 2], [Figure 3]
 
 
    Tables

  [Table 1], [Table 2], [Table 3], [Table 4], [Table 5]


This article has been cited by
1 Serum ferritin and the risk of hepatocellular carcinoma in chronic liver disease of viral etiology: A case–control study
Prachi S. Patil,K. M. Mohandas,Shobna J. Bhatia,Shaesta A. Mehta
Indian Journal of Gastroenterology. 2013;
[Pubmed]
2 Recent progress on nutraceutical research in prostate cancer
Yiwei Li,Aamir Ahmad,Dejuan Kong,Bin Bao,Fazlul H. Sarkar
Cancer and Metastasis Reviews. 2013;
[Pubmed]
3 Incidence of Bladder Cancer in Sri Lanka: Analysis of the Cancer Registry Data and Review of the Incidence of Bladder Cancer in the South Asian Population
Weranja K. B. Ranasinghe, Daswin De Silva, M.V.C. De Silva, Tamra I J Ranasinghe, Nathan Lawrentschuk, Damien Bolton, Raj Persad
Korean Journal of Urology. 2012; 53(5): 304
[VIEW]
4 Risk factors for multiple myeloma: A hospital-based case–control study in Northwest China
Qixia Wang,Yiwei Wang,Zhaohua Ji,Xiequn Chen,Yaozhu Pan,Guangxun Gao,Hongtao Gu,Yang Yang,Bernard C.K. Choi,Yongping Yan
Cancer Epidemiology. 2012; 36(5): 439
[Pubmed]
5 Incidence of prostate cancer in Sri Lanka using cancer registry data and comparisons with the incidence in South Asian men in England : PROSTATE CANCER IN SRI LANKA
Weranja K.B. Ranasinghe, Thabani Sibanda, M.V.C. de Silva, Tamra I.J. Ranasinghe, Raj Persad
BJU International. 2011; : no
[VIEW]
6 Racial differences in the incidence of colorectal cancer
Virk, R., Gill, S., Yoshida, E., Radley, S., Salh, B.
Canadian Journal of Gastroenterology. 2010; 24(1): 47-51
[Pubmed]
7 Hypothesis: Towards the origin of cancer epidemics and pathogenesis
Rumyantsev, S.
Journal of Carcinogenesis. 2010; 9(art 2)
[Pubmed]
8 Leading causes of mortality of Asian Indians in California
Palaniappan, L., Mukherjea, A., Holland, A., Ivey, S.L.
Ethnicity and Disease. 2010; 20(1): 53-57
[Pubmed]
9 Epidemiology of primary brain tumors in the Middle Eastern population in California, USA 2001–2005
Kiumarss Nasseri,John R. Mills
Cancer Detection and Prevention. 2009; 32(5-6): 363
[Pubmed]
10 Cancer among Asian Indians/Pakistanis living in the United States: Low incidence and generally above average survival
Goggins, W.B., Wong, G.
Cancer Causes and Control. 2009; 20(5): 635-643
[Pubmed]
11 Epidemiology of primary brain tumors in the Middle Eastern population in California, USA 2001-2005
Nasseri, K., Mills, J.R.
Cancer Epidemiology. 2009; 32(5-6): 363-371
[Pubmed]
12 Rates and sociodemographic correlates of cancer screening among South Asians
Glenn, B.A., Chawla, N., Surani, Z., Bastani, R.
Journal of Community Health. 2009; 34(2): 113-121
[Pubmed]
13 Ethnicity and cancer in Guyana, South America
Best Plummer, W.S., Persaud, P., Layne, P.J.
Infectious Agents and Cancer. 2009; 4(Suppl 1): Art S7
[Pubmed]
14 Ethnicity and cancer in Guyana, South America
Wallis S Best Plummer,Premini Persaud,Penelope J Layne
Infectious Agents and Cancer. 2009; 4(Suppl 1): S7
[Pubmed]
15 Cancer among Asian Indians/Pakistanis living in the United States: low incidence and generally above average survival
William B. Goggins,Grace Wong
Cancer Causes & Control. 2009; 20(5): 635
[Pubmed]
16 Tobacco use among South Asians: Results of a community-university collaborative study
Glenn, B.A., Surani, Z., Chawla, N., Bastani, R.
Ethnicity and Health. 2009; 14(2): 131-145
[Pubmed]
17 Demographics, pathologic patterns and long-term survival in operable colon cancers: Local experience in Pakistan
Shaikh, A.J., Raza, S., Shaikh, A.A., Idress, R., Kumar, S., Rasheed, Y.A., Lal, A., Masood, N.
Asian Pacific Journal of Cancer Prevention. 2009; 10(3): 361-364
[Pubmed]
18 Cervical cancer incidence, mortality, and survival among Asian subgroups in California, 1990-2004
Janet H. Bates, Brenda M. Hofer, Arti Parikh-Patel
Cancer. 2008; 113(s10): 2955
[VIEW]
19 Epidemiology of Non-small Cell Lung Cancer in Asian Americans
Dan J. Raz,Scarlett L. Gomez,Ellen T. Chang,Jae Y. Kim,Theresa H. M. Keegan,Jane Pham,Jasleen Kukreja,Robert A. Hiatt,David M. Jablons
Journal of Thoracic Oncology. 2008; 3(12): 1391
[Pubmed]
20 Oral and pharyngeal cancer in South Asians and non-South Asians in relation to socioeconomic deprivation in South East England
D R Moles,S Fedele,P M Speight,S R Porter,I dos Santos Silva
British Journal of Cancer. 2008; 98(3): 633
[Pubmed]
21 Epidemiology of non-small cell lung cancer in Asian Americans: Incidence patterns among six subgroups by nativity
Raz, D.J., Gomez, S.L., Chang, E.T., Kim, J.Y., Keegan, T.H.M., Pham, J., Kukreja, J., (...), Jablons, D.M.
Journal of Thoracic Oncology. 2008; 3(12): 1391-1397
[Pubmed]
22 Gene-environment interactions in breast cancer
Chia, K.-S.
Novartis Foundation Symposium. 2008; 293: 143-150
[Pubmed]
23 Oral and pharyngeal cancer in South Asians and non-South Asians in relation to socioeconomic deprivation in South East England
Moles, D.R., Fedele, S., Speight, P.M., Porter, S.R., Silva, I.D.S.
British Journal of Cancer. 2008; 98(3): 633-635
[Pubmed]
24 Cancer incidence rates among South Asians in four geographic regions: India, Singapore, UK and US
Rastogi, T., Devesa, S., Mangtani, P., Mathew, A., Cooper, N., Kao, R., Sinha, R.
International Journal of Epidemiology. 2008; 37(1): 147-160
[Pubmed]
25 Cancer incidence rates among South Asians in four geographic regions: India, Singapore, UK and US
T. Rastogi,S. Devesa,P. Mangtani,A. Mathew,N. Cooper,R. Kao,R. Sinha
International Journal of Epidemiology. 2008; 37(1): 147
[Pubmed]
26 Differences in prognostic factors and survival among white and Asian men with prostate cancer, California, 1995-2004
Robbins, A.S., Koppie, T.M., Gomez, S.L., Parikh-Patel, A., Mills, P.K.
Cancer. 2007; 110(6): 1255-1263
[Pubmed]
27 Guest editorial
Ali, K.
Oral Oncology. 2007; 43(7): 625
[Pubmed]
28 Punjabi womenæs stories of breast cancer symptoms: Gulti (lumps), bumps, and darad (pain)
Bottorff, J.L., Grewal, S.K., Balneaves, L.G., Naidu, P., Johnson, J.L., Sawhney, R.
Cancer Nursing. 2007; 30(4): E36-E45
[Pubmed]
29 Tendency of the colorectal cancer in a zone of northern Spain | [Tendencia del cáncer colorectal en una zona del norte de España]
Bernal, M., Gómez, G.J., Gómez, F.J.
Acta Gastroenterologica Latinoamericana. 2007; 37(2): 84-90
[Pubmed]
30 Recent trends in breast cancer incidence among 6 Asian groups in the Greater Bay Area of Northern California
Keegan, T.H.M., Gomez, S.L., Clarke, C.A., Jo, K.C., Glaser, S.L.
International Journal of Cancer. 2007; 120(6): 1324-1329
[Pubmed]
31 Differences in prognostic factors and survival among white and Asian men with prostate cancer, California, 1995–2004
Anthony S. Robbins,Theresa M. Koppie,Scarlett L. Gomez,Arti Parikh-Patel,Paul K. Mills
Cancer. 2007; 110(6): 1255
[Pubmed]
32 Recent trends in breast cancer incidence among 6 Asian groups in the Greater Bay Area of Northern California
Theresa H.M. Keegan,Scarlett L. Gomez,Christina A. Clarke,Jo Kay Chan,Sally L. Glaser
International Journal of Cancer. 2007; 120(6): 1324
[Pubmed]
33 Guest editorial
Kamran Ali
Oral Oncology. 2007; 43(7): 625
[Pubmed]
34 Indian National Cancer Control Programme: Setting sight on shifting targets
Rajiv, S.
Journal of Cancer Research and Therapeutics. 2005; 1(4): 240-248
[Pubmed]



 

Top
Previous article  Next article
 
  Search
 
Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
Access Statistics
Email Alert *
Add to My List *
* Registration required (free)  

 
  In this article
Abstract
Background
Methods
Results
Discussion
Conclusion
List of Abbrevia...
Authors' contrib...
References
Article Figures
Article Tables

 Article Access Statistics
    Viewed4693    
    Printed284    
    Emailed1    
    PDF Downloaded688    
    Comments [Add]    
    Cited by others 34    

Recommend this journal