Figure 3.

Non-linear relationship between physical activity and mortality risk according to the presence of cardiovascular disease and expected 10-year risk of fatal cardiovascular disease. Restricted cubic spline curves were constructed with regard to physical activity treated as a continuous variable. Adjusted hazard ratio and 95% confidence intervals are illustrated. The red, orange, green, and blue lines and shades indicate subjects with cardiovascular disease and subjects without cardiovascular disease who have an estimated 10-year risk of fatal cardiovascular disease ≥10%, 5–10%, and <5%, respectively.