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Cancer Causes Control. 2009 Jul;20(5):765-73. doi: 10.1007/s10552-008-9291-x. Epub 2008 Dec 31.

Prospective study of physical activity and the risk of ovarian cancer.

Author information

1
Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 6120 Executive Blvd, Rockville, MD 20892, USA. michael.leitzmann@klinik.uni-regensburg.de

Abstract

BACKGROUND:

Available studies on physical activity and ovarian cancer have produced inconsistent findings, with some previous studies reporting a positive association between vigorous physical activity and ovarian cancer risk.

METHODS:

We prospectively investigated the relations of self-reported moderate and vigorous physical activity to ovarian cancer in a cohort of 96,216 US women aged 51-72 years at baseline, followed from 1996-1997 to 31 December 2003.

RESULTS:

During seven years of follow-up, we documented 309 cases of epithelial ovarian carcinoma. In analyses adjusted for age, the relative risks (RRs) of ovarian cancer for individual and joint combinations of moderate and vigorous physical activity such as entirely inactive, neither moderate nor vigorous physical activity, moderate physical activity only, vigorous physical activity only, and both moderate and vigorous physical activity were 0.88, 1.0 (reference), 0.89, 1.05, and 1.08 (95% confidence interval (CI) = 0.81-1.43, respectively. After multivariate adjustment, the relation was essentially unchanged (RR comparing women with both moderate and vigorous physical activity to those with neither moderate nor vigorous physical activity = 1.10; 95% CI = 0.82-1.48). The null association between physical activity and ovarian cancer persisted in subgroups of women as defined by body mass index, parity, oral contraceptive use, menopausal hormone therapy, family history of ovarian cancer, and other variables (all p values for interaction >0.05).

CONCLUSIONS:

Neither moderate nor vigorous physical activity showed a statistically significant association with ovarian cancer in this large cohort of women.

PMID:
19116765
PMCID:
PMC3434951
DOI:
10.1007/s10552-008-9291-x
[Indexed for MEDLINE]
Free PMC Article

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