Figure 2. Risk of Heart Failure According to Combined Categories of Body-mass Index and Vigorous Physical Activity at the Base-Line Examination.

Vertical bars represent the 95 percent confidence intervals for the hazard ratios. The referent group includes men with a BMI lower than 25 and who vigorously exercised at least 1 to 3 times a month. Hazard ratios were adjusted for age, cigarette smoking (never [referent], past only, current), alcohol consumption (rarely/never, monthly, weekly, daily [referent]), and presence or absence of parental history of myocardial infarction, history of hypertension, diabetes mellitus, and hypercholesterolemia, and random assignment to aspirin or beta-carotene at base-line.