Figure 2.

Kaplan-Meier survival curve for time to incident Alzheimer's disease by adiposity risk status (elevated body mass index and waist circumference (obese at age 30, 40, or 45 years and in upper quintile of waist circumference at age 30, 35, or 50 years) vs. no elevation) among women, Baltimore Longitudinal Study of Aging, 1958–2006. The hazard ratio was 6.57 (95% confidence interval: 1.96, 22.02; P < 0.01; log-rank test: P = 0.0003). Failure was defined as first diagnosis of incident Alzheimer's disease at or after age 50 years. Hazard ratios were adjusted for education, race/ethnicity, smoking status, and year of birth.