Figure 1. Relationship between Aerobic Physical Activity and Digestive System Cancer Risk.
HR (95% CI) was adjusted for participation in weight lifting (yes versus no) and the same set of variables as denoted in Table 2; was 0.83 (0.74, 0.92) at 11 MET-hours/week, 0.68 (0.56, 0.83) at 30 MET-hours/week, and 0.68 (0.56, 0.82) at 42 MET-hours/week. P value comparing the fit of non-linear versus linear model was 0.02; P value for overall significance of curve was <0.001.