No association of meat, fish, and egg consumption with ovarian cancer risk.

Ecologic and migration studies showed positive correlations between meat and egg consumption and rates of ovarian cancer (1, 2). Although these data suggest that environmental factors are of importance in the etiology of ovarian cancer, they are seriously confounded by other aspects of diet, other lifestyle factors, and economic development. Prospective cohort studies can better control for possible confounding factors. To date, however, only two prospective cohort studies have examined meat and egg consumption in relation to ovarian cancer incidence (3, 4). These two studies reported no significant association between meat consumption and ovarian cancer risk, but found an increased risk associated with high consumption of eggs (3, 4). Cohort data on fish consumption and risk of ovarian cancer are currently lacking. In the present analysis, we sought to prospectively examine the association of meat, fish, and egg consumption with incidence of ovarian cancer in the population-based Swedish Mammography Cohort.