Journal ArticleDOI
A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation☆
TLDR
The method of classifying comorbidity provides a simple, readily applicable and valid method of estimating risk of death fromComorbid disease for use in longitudinal studies and further work in larger populations is still required to refine the approach.About:
This article is published in Journal of Chronic Diseases.The article was published on 1987-01-01. It has received 39961 citations till now. The article focuses on the topics: Risk of mortality & Prospective cohort study.read more
Citations
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Journal ArticleDOI
Adapting a clinical comorbidity index for use with ICD-9-CM administrative databases
TL;DR: It is concluded that the adapted comorbidity index will be useful in studies of disease outcome and resource use employing administrative databases.
Journal ArticleDOI
Comorbidity measures for use with administrative data.
TL;DR: The present method addresses some of the limitations of previous measures and produces an expanded set of comorbidities that easily is applied without further refinement to administrative data for a wide range of diseases.
Journal ArticleDOI
Coding algorithms for defining comorbidities in ICD-9-CM and ICD-10 administrative data.
Hude Quan,Vijaya Sundararajan,Patricia Halfon,Andrew Fong,Bernard Burnand,Jean-Christophe Luthi,L. Duncan Saunders,Cynthia A. Beck,Thomas E Feasby,William A. Ghali +9 more
TL;DR: A multistep process to develop ICD-10 coding algorithms to define Charlson and Elixhauser comorbidities in administrative data and assess the performance of the resulting algorithms found these newly developed algorithms produce similar estimates ofComorbidity prevalence in administrativeData, and may outperform existing I CD-9-CM coding algorithms.
Journal ArticleDOI
Presenting Characteristics, Comorbidities, and Outcomes Among 5700 Patients Hospitalized With COVID-19 in the New York City Area.
Safiya Richardson,Safiya Richardson,Jamie S. Hirsch,Jamie S. Hirsch,Mangala Narasimhan,James M. Crawford,Thomas McGinn,Thomas McGinn,Karina W. Davidson,Karina W. Davidson,Douglas P. Barnaby,Douglas P. Barnaby,Lance B Becker,John Chelico,John Chelico,Stuart L. Cohen,Stuart L. Cohen,Jennifer Cookingham,Kevin Coppa,Michael A Diefenbach,Andrew J. Dominello,Joan Duer-Hefele,Louise Falzon,Jordan Gitlin,Negin Hajizadeh,Negin Hajizadeh,Tiffany G. Harvin,David Hirschwerk,Eun Ji Kim,Eun Ji Kim,Zachary Kozel,Lyndonna Marrast,Lyndonna Marrast,Jazmin N. Mogavero,Gabrielle A. Osorio,Michael Qiu,Theodoros P. Zanos +36 more
TL;DR: This case series provides characteristics and early outcomes of sequentially hospitalized patients with confirmed COVID-19 in the New York City area and assesses outcomes during hospitalization, such as invasive mechanical ventilation, kidney replacement therapy, and death.
Journal ArticleDOI
Validation of a combined comorbidity index.
Mary E. Charlson,Ted P. Szatrowski,Ted P. Szatrowski,Janey C. Peterson,Janey C. Peterson,Jeffrey P. Gold +5 more
TL;DR: The estimated relative risk of death from an increase of one in the comorbidity score proved approximately equal to that from an additional decade of age.
References
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Regression Models and Life-Tables
TL;DR: The analysis of censored failure times is considered in this paper, where the hazard function is taken to be a function of the explanatory variables and unknown regression coefficients multiplied by an arbitrary and unknown function of time.
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Maximum utilization of the life table method in analyzing survival
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