FIGURE 1.

Restricted cubic splines of the hazard ratios of incident heart failure with socioeconomic status and cardiorespiratory fitness. (A) Socioeconomic status and HF risk; (B) Cardiorespiratory fitness and HF risk. CRF, cardiorespiratory fitness; HF, heart failure; SES, socioeconomic status. Models were adjusted for age, systolic blood pressure, body mass index, heart rate, smoking status, history of type 2 diabetes, history of coronary heart disease, total cholesterol, high‐density lipoprotein cholesterol, and physical activity