Hude Quan

Coding Algorithms for Defining Comorbidities in ICD-9-CM and ICD-10 Administrative Data

Hude Quan, Vijaya Sundararajan, Patricia Halfon et al. · Medical Care · 2005 · 10.6K citations

Health Professions, Internal Medicine, Clinical Classification Systems +16

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

Hude Quan, Bing Li, Chantal Marie Couris et al. · American Journal of Epidemiology · 2011 · 5.9K citations · Full text

Health Professions, Health Services Administration, Clinical Classification Systems +16

New ICD-10 version of the Charlson comorbidity index predicted in-hospital mortality

Vijaya Sundararajan, Toni Henderson, Catherine Perry et al. · Journal of Clinical Epidemiology · 2004 · 2.5K citations

Education, Health Sciences, Internal Medicine +16

A Modification of the Elixhauser Comorbidity Measures Into a Point System for Hospital Death Using Administrative Data

Carl van Walraven, Peter C. Austin, Alison Jennings et al. · Medical Care · 2009 · 2.2K citations

Public Health, Biostatistics, Internal Medicine +17

Exploring physician specialist response rates to web-based surveys

Ceara Cunningham, Hude Quan, Brenda R. Hemmelgarn et al. · BMC Medical Research Methodology · 2015 · 1K citations · Full text

Medicine, Internal Medicine, Neurosurgery +17