Core concepts in pharmacoepidemiology: Violations of the positivity assumption in the causal analysis of observational data: Consequences and statistical approaches
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DOI: 10.1002/pds.5338
Abstract: In the causal analysis of observational data, the positivity assumption requires that all treatments of interest be observed in every patient subgroup. Violations of this assumption are indicated by nonoverlap in the data in the… read more here.
Keywords: assumption; analysis observational; positivity; causal analysis ... See more keywords