OBJECTIVE: To compare the ability of commonly used measures of medical comorbidity
(ambulatory care groups [ACGs], Charlson comorbidity index, chronic disease score …

OBJECTIVE: To develop and validate a single numerical comorbidity score for predicting
short-and long-term mortality, by combining conditions in the Charlson and Elixhauser …

Comorbidity is an important confounder in epidemiologic studies. The authors compared the
predictive performance of comorbidity scores for use in epidemiologic research with …

Objective. To define and improve the performance of existing comorbidity scores in
predicting mortality in Medicare enrollees. Data Sources. Study participants were two …

Objectives To conduct a systematic review of studies reporting on the development or
validation of comorbidity indices using administrative health data and compare their ability to …

Claims-based measures of comorbid illness severity have generally relied on the diagnoses
listed for a single hospitalization. Unfortunately, such diagnostic information is often limited …

Objectives. This study attempts to develop a comprehensive set of comorbidity measures for
use with large administrative inpatient datasets. Methods. The study involved clinical and …

OBJECTIVE: The performance of standard comorbidity scores to control confounding is
poorly defined in health care utilization data across elderly populations. We sought to …

OBJECTIVE:(1) To determine chronic illness costs for large cohort of primary care
patients,(2) to develop prospective model predicting total costs over one year, using …

Background Comorbidity scores are increasingly used to reduce potential confounding in
epidemiological research. Our objective was to compare metrical and practical properties of …