Development of a comorbidity index using physician claims data

A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation

Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al. · Journal of Chronic Diseases · 1987 · 49.9K citations

Public Health, Biostatistics, Clinical Classification Systems +15

Adapting a clinical comorbidity index for use with ICD-9-CM administrative databases

Richard A. Deyo · Journal of Clinical Epidemiology · 1992 · 10.5K citations

Education, Health Informatics, Clinical Classification Systems +12

Comorbidity Measures for Use with Administrative Data

Anne Elixhauser, Claudia Steiner, D.R. Harris et al. · Medical Care · 1998 · 9.9K citations

Education, Health Services Administration, Health Assessment +16

Counting Processes and Survival Analysis.

Dorota M. Dabrowska, Thomas R. Fleming, David P. Harrington · Journal of the American Statistical Association · 1992 · 2.3K citations

Public Health, Biostatistics, Stochastic Processes +10

International Classification of Diseases, 10th Revision

The SAGE Encyclopedia of Intellectual and Developmental Disorders · 2018 · 1.9K citations

Health Professions, Internal Medicine, Clinical Classification Systems +3