Risk adjustment for older hospitalized persons

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

1987 • 44,619 citations

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High agreement but low Kappa: I. the problems of two paradoxes

1990 • 2,657 citations

Presentation adapting a clinical comorbidity index for use with ICD-9-CM administrative data: Differing perspectives

1993 • 1,704 citations

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Can Comorbidity Be Measured By Questionnaire Rather than Medical Record Review?

1996 • 1,027 citations

A Predictive Model for Delirium in Hospitalized Elderly Medical Patients Based on Admission Characteristics

1993 • 848 citations

Importance of Functional Measures in Predicting Mortality Among Older Hospitalized Patients

1998 • 781 citations

The accuracy of Medicare's hospital claims data: progress has been made, but problems remain.

1992 • 723 citations

Clinimetrics

1987 • 469 citations

Assessing hospital-associated deaths from discharge data. The role of length of stay and comorbidities

1988 • 342 citations

A predictive index for functional decline in hospitalized elderly medical patients

1993 • 271 citations

Comorbid Illness is Associated with Survival and Length of Hospital Stay in Patients with Chronic Disability

1996 • 269 citations

Searching for an improved clinical comorbidity index for use with ICD-9-CM administrative data

1996 • 247 citations

A comparison of administrative versus clinical data: coronary artery bypass surgery as an example

1994 • 198 citations

Using administrative data to describe casemix: A comparison with the medical record

1994 • 174 citations

Problems of Comorbidity in Mortality After Prostatectomy

1992 • 150 citations

A Clinical-Severity Staging System for Patients with Lung Cancer

1990 • 148 citations

Evaluation of two competing methods for calculating Charlson's comorbidity index when analyzing short-term mortality using administrative data

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Comorbidity measurement in elderly female breast cancer patients with administrative and medical records data

1997 • 145 citations

Illness severity and costs of admissions at teaching and nonteaching hospitals.

1990 • 122 citations

The Time and Change Test: A Simple Screening Test for Dementia

1998 • 55 citations

Problems of comorbidity in mortality after prostatectomy

1992 • 50 citations

Illness severity and costs of admissions at teaching and nonteaching hospitals

1990 • 23 citations