Racial/ethnic differences in the epidemiology of ovarian cancer: a pooled analysis of 12 case-control studies.
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ABSTRACT: Background:Ovarian cancer incidence differs substantially by race/ethnicity, but the reasons for this are not well understood. Data were pooled from the African American Cancer Epidemiology Study (AACES) and 11 case-control studies in the Ovarian Cancer Association Consortium (OCAC) to examine racial/ethnic differences in epidemiological characteristics with suspected involvement in epithelial ovarian cancer (EOC) aetiology. Methods:We used multivariable logistic regression to estimate associations for 17 reproductive, hormonal and lifestyle characteristics and EOC risk by race/ethnicity among 10 924 women with invasive EOC (8918 Non-Hispanic Whites, 433 Hispanics, 911 Blacks, 662 Asian/Pacific Islanders) and 16 150 controls (13 619 Non-Hispanic Whites, 533 Hispanics, 1233 Blacks, 765 Asian/Pacific Islanders). Likelihood ratio tests were used to evaluate heterogeneity in the risk factor associations by race/ethnicity. Results:We observed statistically significant racial/ethnic heterogeneity for hysterectomy and EOC risk (P?=?0.008), where the largest odds ratio (OR) was observed in Black women [OR?=?1.64, 95% confidence interval (CI)?=?1.34-2.02] compared with other racial/ethnic groups. Although not statistically significant, the associations for parity, first-degree family history of ovarian or breast cancer, and endometriosis varied by race/ethnicity. Asian/Pacific Islanders had the greatest magnitude of association for parity (?3 births: OR?=?0.38, 95% CI?=?0.28-0.54), and Black women had the largest ORs for family history (OR?=?1.77, 95% CI?=?1.42-2.21) and endometriosis (OR?=?2.42, 95% CI?=?1.65-3.55). Conclusions:Although racial/ethnic heterogeneity was observed for hysterectomy, our findings support the validity of EOC risk factors across all racial/ethnic groups, and further suggest that any racial/ethnic population with a higher prevalence of a modifiable risk factor should be targeted to disseminate information about prevention.
SUBMITTER: Peres LC
PROVIDER: S-EPMC5913601 | biostudies-literature | 2018 Apr
REPOSITORIES: biostudies-literature
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