Title

Diet quality and survival after ovarian cancer: results from the Women's Health Initiative

UMMS Affiliation

UMass Worcester Prevention Research Center; Department of Medicine, Division of Preventive and Behavioral Medicine

Date

10-21-2014

Document Type

Article

Disciplines

Dietetics and Clinical Nutrition | Neoplasms | Women's Health

Abstract

BACKGROUND: Survival after an ovarian cancer diagnosis is poor. Given the high mortality in these patients, efforts to identify modifiable lifestyle behaviors that could influence survival are needed. Earlier evidence suggests a protective role for vegetables, but no prior studies have evaluated overall dietary quality and ovarian cancer survival. The purpose of this analysis was to evaluate the role of prediagnosis diet quality in ovarian cancer survival.

METHODS: We identified 636 centrally adjudicated cases of ovarian cancer within the Women's Health Initiative Observational Study or Clinical Trials of 161808 postmenopausal women followed from 1995 to 2012. Dietary quality was assessed for the Healthy Eating Index (2005) using a food frequency questionnaire, covariables were obtained from standardized questionnaires, and adiposity was measured by clinic-based measurements of height, weight, and waist circumference. The association between diet quality and mortality was analyzed using Cox proportional hazards regression, adjusted for potential confounders, and stratified by waist circumference, physical activity level, and diabetes status. Tests of statistical significance were two-sided.

RESULTS: Overall, higher diet quality was associated with lower all-cause mortality after ovarian cancer (hazard ratio [HR] for highest vs lowest tertile = 0.73; 95% confidence interval [CI] = 0.55 to 0.97, P(trend) = .03). The effect was strongest among women with waist circumference of 88 cm or less and with no history of diabetes (HR = 0.73, 95% CI = 0.54 to 0.98). Physical activity level did not modifythe association between diet quality and survival.

CONCLUSION: Our results suggest that overall higher prediagnosis diet quality may protect against mortality after ovarian cancer.

Rights and Permissions

Citation: J Natl Cancer Inst. 2014 Oct 21;106(11). pii: dju314. doi: 10.1093/jnci/dju314. Print 2014 Nov . Link to article on publisher's site

Related Resources

Link to Article in PubMed

PubMed ID

25335480