Relative risk for incident total CHD vs. BMI in 35,566 men followed prospectively for 7.7 years. Results are presented with and without adjustments for physical activity (km/day) to demonstrate that the relationships with BMI are largely unaffected by exercise level. Significance levels for the relative risk relative to men 22.5 < BMI < 25 kg/m2 are coded: *P < 0.05, †P < 0.01, ‡P < 0.005, and §P < 0.001 by Cox proportional hazards analyses. Brackets designate 95% confidence intervals. All analyses were adjusted for age, education, pack-years of prior cigarette use, and reported weekly intakes of meat, fish, fruit, alcohol, and aspirin.