Validation of a combined comorbidity index

Charlson, 1987, A new method of classification of prognostic comorbidity for longitudinal studies: development and validation, J Chron Disease, 40, 373, 10.1016/0021-9681(87)90171-8

Hutchinson, 1982, Predicting survival in adults with end stage renal disease, Ann Intern Med, 96, 417, 10.7326/0003-4819-96-4-417

Charlson, 1989, Pre-operative and intra-operative hemodynamic predictors of postoperative myocardial infarction or ischemia in patients undergoing non-cardiac surgery, Ann Surg, 210, 637, 10.1097/00000658-198911000-00012

Rose, 1968, Cardiovascular Survey Methods World Health Organization Monograph, 172

Goldman, 1977, Multifactorial index of cardiac risk in noncardiac surgical procedures, N Engl J Med, 297, 845, 10.1056/NEJM197710202971601

1988

1991

Kaplan, 1974, The importance of classifying initial comorbidity in evaluating the outcome of diabetes mellitus, J Chron Disease, 27, 387, 10.1016/0021-9681(74)90017-4