1. Causation is defined by a different risk in the entire population under two potential exposure values; association is defined by a different risk in the subsets of the population determined by the subjects’ actual exposure value.
Causation is defined by a different risk in the entire population under two potential exposure values; association is defined by a different risk in the subsets of the population determined by the subjects’ actual exposure value.
M A Hernán J Epidemiol Community Health 2004;58:
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