2022
DOI: 10.21203/rs.3.rs-2026639/v1
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Abstract: Researchers use risk-adjustment models to account for severity of illness in comparing patient outcomes across hospitals. Researchers specify important features as main effects, but they ignore interaction effects or use stratification methods, to account for effect modification, despite its limitations resulting from the number of potential strata. The Agency for Healthcare Research and Quality Inpatient Quality Indicator (IQI) 11, Abdominal Aortic Aneurysm Repair Mortality, is stratified into four groups bas… Show more

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