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Coding Algorithms for Defining Comorbidities in ICD-9-CM and ICD-10 Administrative Data
Objectives:Implementation of the International Statistical Classification of Disease and Related Health Problems, 10th Revision (ICD-10) coding system presents challenges for using administrativeExpand
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Updating and validating the Charlson comorbidity index and score for risk adjustment in hospital discharge abstracts using data from 6 countries.
With advances in the effectiveness of treatment and disease management, the contribution of chronic comorbid diseases (comorbidities) found within the Charlson comorbidity index to mortality isExpand
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New ICD-10 version of the Charlson comorbidity index predicted in-hospital mortality.
BACKGROUND AND OBJECTIVE The ICD-9-CM adaptation of the Charlson comorbidity score has been a valuable resource for health services researchers. With the transition into ICD-10 coding worldwide, anExpand
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A Modification of the Elixhauser Comorbidity Measures Into a Point System for Hospital Death Using Administrative Data
Background:Comorbidity measures are necessary to describe patient populations and adjust for confounding. In direct comparisons, studies have found the Elixhauser comorbidity system to beExpand
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Adapting the Charlson Comorbidity Index for use in patients with ESRD.
BACKGROUND Accurate prediction of survival for patients with end-stage renal disease (ESRD) and multiple comorbid conditions is difficult. In nondialysis patients, the Charlson Comorbidity Index hasExpand
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Assessing validity of ICD-9-CM and ICD-10 administrative data in recording clinical conditions in a unique dually coded database.
OBJECTIVE The goal of this study was to assess the validity of the International Classification of Disease, 10th Version (ICD-10) administrative hospital discharge data and to determine whether thereExpand
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Comparison of the Elixhauser and Charlson/Deyo Methods of Comorbidity Measurement in Administrative Data
Background:Comorbidity risk adjustment methods have been used widely with administrative data, and the Charlson/Deyo method is perhaps the most commonly used in the literature. However, a new methodExpand
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Diagnosed hypertension in Canada: incidence, prevalence and associated mortality
Background: Hypertension is a leading risk factor for cardiovascular diseases. Our objectives were to examine the prevalence and incidence of diagnosed hypertension in Canada and compare mortalityExpand
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Cardiovascular risk factors in ethnic populations within Canada: results from national cross-sectional surveys
Background Differences in the prevalence of cardiovascular disease and associated risk factors have been noted across ethnic groups both within and between countries. The Canadian population isExpand
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Validity of Procedure Codes in International Classification of Diseases, 9th revision, Clinical Modification Administrative Data
Background:Administrative hospital discharge data are widely used to assess quality of care in patients undergoing certain procedures. However, little is known about the validity of administrativeExpand
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