Journal
AMERICAN JOURNAL OF EPIDEMIOLOGY
Volume 164, Issue 12, Pages 1150-1159Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/aje/kwj341
Keywords
abdominal fat; body mass index; cohort studies; coronary disease; obesity
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Whether visceral obesity predicts coronary heart disease (CHD) risk above and beyond overall fatness remains unsettled. Moreover, whether the association between visceral obesity and CHD risk differs by sex, age, race, and overall fatness is poorly understood. The authors conducted a cohort study among 101,765 adult members of Kaiser Permanente of Northern California who underwent multiphasic health checkups between 1965 and 1970. After a median of 12 years and adjustment for age, race, body mass index (BMI), educational level, smoking, alcohol consumption, and hormone replacement therapy (in women), the upper quartile of standing sagittal abdominal diameter, relative to the lowest quartile, was associated with a 1.42-fold increased hazard of CHD in men (95% confidence interval: 1.30, 1.55) and a 1.44-fold increased hazard of CHD in women (95% confidence interval: 1.30, 1.59). Further adjustment for metabolic mediators attenuated the association minimally. Standing sagittal abdominal diameter was a consistent predictor of CHD across racial groups but was more strongly associated with CHD in the younger age group. Joint consideration of BMI/standing sagittal abdominal diameter categories better discriminated risk of CHD compared with use of BMI alone. In conclusion, standing sagittal abdominal diameter was a strong predictor of CHD independently of BMI and added incremental CHD risk prediction at each level of BMI.
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