Milk and lactose intakes and ovarian cancer risk in the Swedish Mammography Cohort.

Notes: 

61,000 women studied: Those who consumed 4 or more servings of total dairy products/day had a risk of serous ovarian cancer twice that of women who consumed <2 servings/day.

TitleMilk and lactose intakes and ovarian cancer risk in the Swedish Mammography Cohort.
Publication TypeJournal Article
Year of Publication2004
AuthorsLarsson SC, Bergkvist L, Wolk A
JournalThe American journal of clinical nutrition
Volume80
Issue5
Pagination1353-7
Date Published2004 Nov
ISSN0002-9165
KeywordsAdult, Aged, Animals, Body Mass Index, Cohort Studies, diet, Female, Humans, Incidence, Lactose, Middle Aged, Milk, Ovarian Neoplasms, Questionnaires, Risk, Sweden
Abstract

BACKGROUND: High intakes of dairy products and of the milk sugar lactose have been hypothesized to increase ovarian cancer risk, but prospective data are scarce.

OBJECTIVE: We examined the association between intakes of dairy products and lactose and the risk of total epithelial ovarian cancer and its subtypes.

DESIGN: This was a prospective population-based cohort study of 61 084 women aged 38-76 y who were enrolled in the Swedish Mammography Cohort. Diet was assessed in 1987-1990 with the use of a self-administered food-frequency questionnaire. During an average follow-up of 13.5 y, 266 women were diagnosed with invasive epithelial ovarian cancer; 125 of those women had serous ovarian cancer.

RESULTS: After adjustment for potential confounders, women who consumed >/=4 servings of total dairy products/d had a risk of serous ovarian cancer (rate ratio: 2.0; 95% CI: 1.1, 3.7; P for trend = 0.06) twice that of women who consumed <2 servings/d. No significant association was found for other subtypes of ovarian cancer. Milk was the dairy product with the strongest positive association with serous ovarian cancer (rate ratio comparing consuming >/=2 glasses milk/d with consuming milk never or seldom: 2.0; 95% CI: 1.1, 3.7; P for trend = 0.04). We observed a positive association between lactose intake and serous ovarian cancer risk (P for trend = 0.006).

CONCLUSIONS: Our data indicate that high intakes of lactose and dairy products, particularly milk, are associated with an increased risk of serous ovarian cancer but not of other subtypes of ovarian cancer. Future studies should consider ovarian cancer subtypes separately.

Alternate JournalAm. J. Clin. Nutr.
PubMed ID15531686
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