Figure 4.
Histogram and overlying probability densities for fitness levels (in METs) measured at age 40-49 years among women with and without heart failure at age > 65 years (Mean: 7.6 vs. 9.7 METs; p-value <0.001), and men with and without heart failure at age > 65 years (Mean: 10.3 vs. 12.3 METs; p-value <0.001). The mean age difference between baseline visit and Medicare entry in this age group was similar for subjects with and without hospitalization for heart failure at a later age [23 vs. 21 years (Men); 21 vs. 20 years (Women)].