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Disparities in colorectal cancer incidence among Latino subpopulations in California defined by country of origin.

ABSTRACT: PURPOSE:In California, colorectal cancer (CRC) is the second most common cancer in Latinos. Using data from the California Cancer Registry, we investigated demographic and clinical characteristics of 36,133 Latinos with CRC living in California during 1995-2011 taking into account subpopulations defined by country of origin. METHODS:Cases were defined as Latino according to the North American Association of Central Cancer Registries Hispanic Identification Algorithm, which was also used to group cases by country of origin: Mexico (9,678, 27 %), Central or South America (2,636, 7 %), Cuban (558, 2 %), Puerto Rico (295, 1 %), and other or unknown origin (22,966, 64 %; Other/NOS). 174,710 non-Hispanic white (NHW) CRC cases were included for comparison purposes. Annual age-adjusted incidence rates (AAIR) and proportional incidence ratios (PIRs) were calculated. RESULTS:Differences were observed for age at diagnosis, sex distribution, socioeconomic status (SES), nativity (US born vs. foreign born), stage, and tumor localization across Latino subpopulations and compared to NHW. Mexican Latinos had the lowest AAIR and Cuban Latinos had the highest. PIRs adjusted for age, SES, and nativity showed an excess of CRC males and female cases from Cuba, female cases from Puerto Rico and reduced number of female cases from Mexico. CONCLUSIONS:Differences in cancer incidence patterns and tumor characteristics were observed among Latino subpopulations in California. These disparities may reflect differences in cancer determinants among Latinos; therefore, given that country of origin information is unavailable for a large proportion of these patients, greater efforts to collect these data are warranted.

SUBMITTER: Stern MC

PROVIDER: S-EPMC4727741 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature

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Disparities in colorectal cancer incidence among Latino subpopulations in California defined by country of origin.

Stern Mariana C MC Zhang Juanjuan J Lee Eunjung E Deapen Dennis D Liu Lihua L

Cancer causes & control : CCC 20151123 2

<h4>Purpose</h4>In California, colorectal cancer (CRC) is the second most common cancer in Latinos. Using data from the California Cancer Registry, we investigated demographic and clinical characteristics of 36,133 Latinos with CRC living in California during 1995-2011 taking into account subpopulations defined by country of origin.<h4>Methods</h4>Cases were defined as Latino according to the North American Association of Central Cancer Registries Hispanic Identification Algorithm, which was als ...[more]

PMID: 26596856

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Project description:Background:Interval colorectal cancer (CRC) accounts for 3% to 8% of all cases of CRC in the United States. Data on interval CRC by race/ethnicity are scant. Objective:To examine whether risk for interval CRC among Medicare patients differs by race/ethnicity and whether this potential variation is accounted for by differences in the quality of colonoscopy, as measured by physicians' polyp detection rate (PDR). Design:Population-based cohort study. Setting:Medicare program. Participants:Patients aged 66 to 75 years who received colonoscopy between 2002 and 2011 and were followed through 2013. Measurements:Kaplan-Meier curves and adjusted Cox models were used to estimate cumulative probabilities and hazard ratios (HRs) of interval CRC, defined as a CRC diagnosis 6 to 59 months after colonoscopy. Results:There were 2735 cases of interval CRC identified over 235 146 person-years of follow-up. A higher proportion of black persons (52.8%) than white persons (46.2%) received colonoscopy from physicians with a lower PDR. This rate was significantly associated with interval CRC risk. The probability of interval CRC by the end of follow-up was 7.1% in black persons and 5.8% in white persons. Compared with white persons, black persons had significantly higher risk for interval CRC (HR, 1.31 [95% CI, 1.13 to 1.51]); the disparity was more pronounced for cancer of the rectum (HR, 1.70 [CI, 1.25 to 2.31]) and distal colon (HR, 1.45 [CI, 1.00 to 2.11]) than for cancer of the proximal colon (HR, 1.17 [CI, 0.96 to 1.42]). Adjustment for PDR did not alter HRs by race/ethnicity, but differences between black persons and white persons were greater among physicians with higher PDRs. Limitation:Colonoscopy and polypectomy were identified by using billing codes. Conclusion:Among elderly Medicare enrollees, the risk for interval CRC was higher in black persons than in white persons; the difference was more pronounced for cancer of the distal colon and rectum and for physicians with higher PDRs. Primary Funding Source:American Cancer Society.

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Disparities in colorectal cancer incidence among Latino subpopulations in California defined by country of origin.

Publications

Disparities in colorectal cancer incidence among Latino subpopulations in California defined by country of origin.

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