SAR HS 300 Study Guide - Midterm Guide: Cohort Study
3 Jan 2017
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Document Summary
Define the basic differences between observational and experimental epidemiology. Identify an epidemiologic study design by its description. List the main characteristics, advantages (strengths), and disadvantages (weaknesses) of each study type. Study design selection: when little is known, do not do long expensive studies, take a quick study that uses existing data, and as more knowledge is gathered, can increase complexity of design. Initial classification of subjects (disease or exposure status) Number of observations i. e. data collection points (1 or >1) Overview of study designs: experimental, quasi-experimental, and observational. Observational studies: make careful measurements of patterns of exposure and disease and draw inferences about etiology: descriptive studies estimates disease frequency and trends. Case reports: 1 case that is abnormal. Case series: a few cases are evident and have common factorsex. Hiv in the 80s when doctors notices that young previously healthy men getting rare diseases. Cross-sectional: analytical studies: generate and test hypothesis and suggest causation.
