ANTC67H3 Lecture Notes - Lecture 4: Fallacy, Statistical Power, Ecological Fallacy
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Randomized controlled trials: experimental studies in which exposure status is assigned to paients by the invesigator, goal: assess efeciveness of intervenion at treaing or controlling health outcome, key components. Individuals are randomly allocated to intervenion and control. Subjects are usually paients (have health outcomes: randomizaion. Formal chance mechanism used to assign subjects to intervenion or control. Intervenion and control groups are comparable at beginning of the study. There must be uncertainty about whether the intervenion under invesigaion is beter than standard care. Field trials: experimental studies in which exposure status is assigned to healthy individuals by the invesigator, goal: assess efeciveness of intervenion in prevening health outcome, key components individuals are randomly allocated to intervenion and control. Community trials: experimental studies in which exposure status is assigned to communiies by the invesigator, goal: assess efeciveness of intervenion targeted at group behavior, key components: Communiies are randomly allocated to intervenion and control. Outcomes are inluenced by social or community condiions.
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