Is intake of breakfast cereals related to total and cause-specific mortality in men?

Abstract

Background: Prospective studies suggested that substituting whole-grain products for refined-grain products lowers the risks of type 2 diabetes and cardiovascular disease (CVD) in women. Although breakfast cereals are a major source of whole and refined grains, little is known about their direct association with the risk of premature mortality.

Objective: We prospectively evaluated the association between whole- and refined-grain breakfast cereal intakes and total and CVD-specific mortality in a cohort of US men.

Design: We examined 86,190 US male physicians aged 40-84 y in 1982 who were free of known CVD and cancer at baseline.

Results: During 5.5 y, we documented 3114 deaths from all causes, including 1381 due to CVD (488 myocardial infarctions and 146 strokes). Whole-grain breakfast cereal intake was inversely associated with total and CVD-specific mortality, independent of age; body mass index; smoking; alcohol intake; physical activity; history of diabetes, hypertension, or high cholesterol; and use of multivitamins. Compared with men who rarely or never consumed whole-grain cereal, men in the highest category of whole-grain cereal intake (> or = 1 serving/d) had multivariate-estimated relative risks of total and CVD-specific mortality of 0.83 (95% CI: 0.73, 0.94; P for trend < 0.001) and 0.80 (0.66, 0.97; P for trend < 0.001), respectively. In contrast, total and refined-grain breakfast cereal intakes were not significantly associated with total and CVD-specific mortality. These findings persisted in analyses stratified by history of type 2 diabetes, hypertension, and high cholesterol.

Conclusions: Both total mortality and CVD-specific mortality were inversely associated with whole-grain but not refined-grain breakfast cereal intake. These prospective data highlight the importance of distinguishing whole-grain from refined-grain cereals in the prevention of chronic diseases.