You are investigating the role of physical activity in

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You are investigating the role of physical activity in heart disease and suggest that physical activity protects against having a heart attack. While presenting these data to your colleagues, someone asks if you have thought about confounders such as factor X. This factor X could have confounded your interpretation of the data if it:

A. is a factor for some other disease, but not heart disease.

B. is a factor associated with physical activity and heart disease.

C. is a part of the pathway by which physical activity affects heart disease.

D. has caused a lack of follow-up of test subjects.

Reference no: EM13617083

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