Improving Prognostic Web Calculators: Violation of Preferential Risk Independence

Abstract

Instead of reporting average risk scores, web-based calculators may improve accuracy of predictions by reporting the unconfounded risks.

Covariate Balancing through Naturally Occurring Strata

“…; Alemi et al. ). For typical inpatient data, at least five diagnoses from a possible list of 14,000 diagnoses are listed for each hospitalization.…”

“…A good example of how misspecification of PS can occur can be seen in analysis of inpatient data. There are many interactions present among the comorbidities of hospitalized patients (Extermann 2007;Ferdinandy et al 2014;Alemi et al 2016). For typical inpatient data, at least five diagnoses from a possible list of 14,000 diagnoses are listed for each hospitalization.…”