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Ovarian cancer risk factors by histologic subtypes in the NIH-AARP Diet and Health Study.

Authors :
Yang HP
Trabert B
Murphy MA
Sherman ME
Sampson JN
Brinton LA
Hartge P
Hollenbeck A
Park Y
Wentzensen N
Source :
International journal of cancer [Int J Cancer] 2012 Aug 15; Vol. 131 (4), pp. 938-48. Date of Electronic Publication: 2011 Nov 10.
Publication Year :
2012

Abstract

Data suggest that risk factors for ovarian carcinoma vary by histologic type, but findings are inconsistent. We prospectively evaluated risk factors by histological subtypes of incident ovarian cancer (n = 849) in a cohort of 169,391 women in the NIH-AARP Diet and Health Study. We constructed Cox models of individual exposures by comparing case subtypes to the entire non-case group and assessed p-heterogeneity in case-case comparisons using serous as the reference category. Substantial risk differences between histologic subtypes were observed for menopausal hormone therapy (MHT) use, oral contraceptive (OC) use, parity and body mass index (p-heterogeneity = 0.01, 0.03, 0.05, 0.03, respectively). MHT users were at increased risk for all histologic subtypes except for mucinous carcinomas, where risk was reduced (relative risk (RR) = 0.37; 95% confidence interval (CI): 0.18, 0.80). OC users were only at significantly decreased risk for serous cancers (RR = 0.69; 95% CI: 0.55, 0.85). Although parity was inversely associated with risk of all subtypes, the RRs ranged from 0.28 (clear cell) to 0.83 (serous). Obesity was a significant risk factor only for endometrioid cancers (RR = 1.64; 95% CI: 1.00, 2.70). Our findings support a link between etiological factors and histological heterogeneity in ovarian carcinoma.<br /> (Published © 2011 UICC.)

Details

Language :
English
ISSN :
1097-0215
Volume :
131
Issue :
4
Database :
MEDLINE
Journal :
International journal of cancer
Publication Type :
Academic Journal
Accession number :
21960414
Full Text :
https://doi.org/10.1002/ijc.26469