Use of comorbidity scores for control of confounding in studies using administrative databases

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

1987 • 44,619 citations

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

1992 • 10,174 citations

Comorbidity Measures for Use with Administrative Data

1998 • 8,872 citations

Validation of a combined comorbidity index

1994 • 6,000 citations

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

1993 • 1,704 citations

QUANTITATIVE METHODS IN THE REVIEW OF EPIDEMIOLOGIC LITERATURE1

1987 • 1,619 citations

Risk Adjustment for Measuring Healthcare Outcomes

1994 • 960 citations

A chronic disease score from automated pharmacy data

1992 • 960 citations

Practical considerations on the use of the charlson comorbidity index with administrative data bases

1996 • 891 citations

Mortality and Reoperation after Open and Transurethral Resection of the Prostate for Benign Prostatic Hyperplasia

1989 • 670 citations

The Treatment of Unrelated Disorders in Patients with Chronic Medical Diseases

1998 • 629 citations

A Chronic Disease Score with Empirically Derived Weights

1995 • 551 citations

Risk Adjustment in Outcome Assessment: the Charlson Comorbidity Index

1993 • 528 citations

Ambulatory care groups: a categorization of diagnoses for research and management.

1991 • 525 citations

Bias in the Coding of Hospital Discharge Data and Its Implications for Quality Assessment

1994 • 348 citations

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

1996 • 247 citations

Flaws in mortality data. The hazards of ignoring comorbid disease

1988 • 246 citations

Explaining variations in hospital death rates. Randomness, severity of illness, quality of care

1990 • 224 citations

A Comparison of the Charlson Comorbidity Index Derived from Medical Record Data and Administrative Billing Data

1999 • 222 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

Confidence interval estimates of an index of quality performance based on logistic regression models

1995 • 173 citations

Does Body Mass Index Adequately Capture the Relation of Body Composition and Body Size to Health Outcomes?

1998 • 152 citations

Problems of Comorbidity in Mortality After Prostatectomy

1992 • 150 citations

Further evidence concerning the use of a clinical comorbidity index with ICD-9-CM administrative data

1993 • 145 citations

Explaining Variations in Hospital Death Rates

1990 • 134 citations

Selecting a patient characteristics index for the prediction of medical outcomes using administrative claims data

1995 • 133 citations

Agreement between physicians' office records and Medicare Part B claims data.

1995 • 132 citations

Replicating the chronic disease score (CDS) from automated pharmacy data

1994 • 117 citations

Further Study of the Increased Mortality Following Transurethral Prostatectomy: A Chart-Based Analysis

1990 • 112 citations

Complications, comorbidities, and mortality: improving classification and prediction.

1997 • 105 citations

Risk adjustment in claims-based research: The search for efficient approaches

1989 • 93 citations

Controlling for confounding by indication for treatment. Are administrative data equivalent to clinical data?

1995 • 53 citations

Problems of comorbidity in mortality after prostatectomy

1992 • 50 citations

Agreement between Drug Treatment Data and a Discharge Diagnosis of Diabetes Mellitus in the Elderly

1999 • 43 citations

Physician Profiling and Risk Adjustment

1997 • 35 citations