Population
Hospitals/patients evaluated for mortality and complication rates after surgery
Comparison
Predictive models adjusting for severity of… vs Models not adjusted for severity of illness
Design
Other
Authors
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Unadjusted hospital rankings risk misleading quality assessments; challenges their construct validity without severity adjustment.
Inadequately controlled confounding variables may lead to a spurious high correlation between outcome measures, falsely suggesting construct validity for hospital quality metrics.
Silber et al. (1997) studied this question.
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