Question: see above A case-control study assesses depression as a risk factor for stroke, finding an overall RR of 3.8. After stratifying by age group, the

see above

A case-control study assesses depression as a risk factor for stroke, finding an overall RR of 3.8. After stratifying by age group, the study reports that the RR of stroke associated with depression in the younger group (age 20-45 years) is 2.3, and the RR in the older group (46-70) is 2.4. With what epidemiologic phenomenon are these results most consistent? A. Selection bias B. Random error C. Information bias D. Confounding E. Interaction O A OB OC OD OE

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