Influence of Using Different Databases and ‘Look Back’ Intervals to Define Comorbidity Profiles for Patients with Newly Diagnosed Hypertension: Implications for Health Services Researchers

Outcomes Among 3.5 Million Newly Diagnosed Hypertensive Canadians

(2013) Hude Quan et al.   CANADIAN JOURNAL OF CARDIOLOGY

Comparative ability of comorbidity classification methods for administrative data to predict outcomes in patients with chronic obstructive pulmonary disease

(2012) Peter C. Austin et al.   ANNALS OF EPIDEMIOLOGY

Systematic Review of Comorbidity Indices for Administrative Data

(2012) Mansour T. A. Sharabiani et al.   MEDICAL CARE

Updating and Validating the Charlson Comorbidity Index and Score for Risk Adjustment in Hospital Discharge Abstracts Using Data From 6 Countries

(2011) H. Quan et al.   AMERICAN JOURNAL OF EPIDEMIOLOGY

Administrative data have high variation in validity for recording heart failure

(2011) Susan Quach et al.   CANADIAN JOURNAL OF CARDIOLOGY

Performance of comorbidity measures for predicting outcomes in population-based osteoporosis cohorts

(2011) L. M. Lix et al.   OSTEOPOROSIS INTERNATIONAL

Comparison of the performance of the CMS Hierarchical Condition Category (CMS-HCC) risk adjuster with the charlson and elixhauser comorbidity measures in predicting mortality

(2010) Pengxiang Li et al.   BMC HEALTH SERVICES RESEARCH

Using routine inpatient data to identify patients at risk of hospital readmission

(2009) Stuart Howell et al.   BMC HEALTH SERVICES RESEARCH

Validity of ascertainment of co-morbid illness using administrative databases: a systematic review

(2009) J.R. Leal et al.   CLINICAL MICROBIOLOGY AND INFECTION

Validation of a Case Definition to Define Hypertension Using Administrative Data

(2009) Hude Quan et al.   HYPERTENSION

Risk adjustment performance of Charlson and Elixhauser comorbidities in ICD-9 and ICD-10 administrative databases

(2008) Bing Li et al.   BMC HEALTH SERVICES RESEARCH

Assessing Validity of ICD-9-CM and ICD-10 Administrative Data in Recording Clinical Conditions in a Unique Dually Coded Database

(2008) Hude Quan et al.   HEALTH SERVICES RESEARCH

Comorbidity risk-adjustment strategies are comparable among persons with hip fracture

(2008) David C. Radley et al.   JOURNAL OF CLINICAL EPIDEMIOLOGY