SimpleMed+ Encyclopaedia
Population and Social Science key concepts
2 revision pages for Population and Social Science, each with the key facts, a memory aid where one helps, and the exam traps.
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Cross-sectional studies and temporal sequence
A cross-sectional study is a snapshot that records exposure (the factor being studied) and outcome (the disease or event of interest) together, so it cannot show which came first.
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Ecological fallacy
The ecological fallacy is the mistake of taking an association seen in groups, such as regions or countries, and wrongly applying it to the individuals inside those groups.