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Unformatted text preview: What contributes to disease in urban areas? What are two methods of hypothesis formulation? What characterizes: case-control studies ecologic studies cohort studies (prospective and retrospective) cyclic trends secular trends clustering positive associations negative associations dose-response thresholds web-of-causation model observational design experimental design 1 What is: mean mode latency inference bias odds ratio relative risk exposure assessment Why do we use random assignment? What is and what are some of its uses? Be able to identify and define Bradford-Hill criteria for causality. 2...
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- Spring '10