5. COHORT STUDIES - a group of people are followed over time to see who develops the disease. Follow over time compare exposure to risk factors and draw conclusions group with condition group without condition Follow over time compare outcomes and draw conclusions group with condition group without condition Follow over time group with condition group without condition Population exposed to risk factor Population not exposed to risk factor Population OR
6. Case Control – a group of people who have the disease are compared with a group who do not have the disease cases without condition cases with condition Take histories of exposure to risk factors, compare and draw conclusions
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