How do you interpret the RR for exercising once per week? Frequency of Person Years of Cases of CHD Rate per 10,000 Risk Ratio Exercise Follow-up Population No Exercise 32,843 23 7.0 Reference Once per Week 117,205 40 3.49 0.49 Twice per Week 25,111 4 1.59 0.23 Compared to people that do not exercise, people that exercise once a week are 0.49 times less likely to get CHD. O Compared to people that exercise once a week, people that do not exercise are 0.49 times less likely to get CHD. O Compared to people that exercise twice a week, people that exercise once a week are 0.49 times less likely to get CHD. Compared to people that do not exercise, people that exercise once a week are at a 0.49 greater odds of getting CHD