Relative risk of self-reported physician-diagnosed diverticular disease by usual running distance relative to the least active runners, adjusted for age, sex, pack-years of cigarette consumption, and intake of meat, fish, fruit, and alcohol. Additional adjustment for BMI where indicated. *P ≤ 0.05 for the reduction in risk relative to the least active runners. Relative risks (rr) per kilometer-per-day increment in daily running distance (as a continuous variable) presented at the top.