Summary Description: The Charlson Comorbidity Index (CCI) was developed and validated
as a measure of 1-year mortality risk and burden of disease. 1–4 To account for age being …

Abstract The Charlson Comorbidity Index (CCI) is a highly cited and well established tool for
measuring comorbidity in clinical research, but there are problems with its use in practice …

Comorbidity generally is measured by medical record abstraction, which is expensive and
often impractical. The aim of this study was to assess the reproducibility and validity of a …

Abstract Background The Centers for Medicare and Medicaid Services (CMS) has
implemented the CMS-Hierarchical Condition Category (CMS-HCC) model to risk adjust …

PURPOSE Many patients consulting in primary care have multiple conditions
(multimorbidity). Aims of this review were to identify measures of multimorbidity and …

Background. The comorbidity variables that constitute the Charlson index are widely used in
health care research using administrative data. However, little is known about the validity of …

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

Background Patients with comorbidities do not receive optimal treatment for their cancer,
leading to lower cancer survival. Information on individual comorbidities is not …

The object of this article was to systematically review available methods to measure
comorbidity and to assess their validity and reliability. A search was made in Medline and …

Background: Recently, van Walraven developed a weighted summary score (VW) based on
the 30 comorbidities from the Elixhauser comorbidity system. One of the 30 comorbidities …