How do you interpret the RR for exercising once per week? Frequency of Person Years Cases of CHD Rate per 10,000 Risk Ratio
Exercise of 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
A. Compared to people that exercise once a week, people that do not exercise are 0.49 times less likely to get CHD.
B. Compared to people that do not exercise, people that exercise once a week are 0.49 times less likely to get CHD.
C. Compared to people that exercise twice a week, people that exercise once a week are 0.49 times less likely to get CHD.
D. Compared to people that do not exercise, people that exercise once a week are at a 0.49 greater odds of getting CHD.