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

By Hude Quan, V. Sundararajan, P. Halfon, A. fong, B. Burnand, J. Luthi, L. D. Saunders, C. Beck, T. Feasby, W. Ghali. Medical Care, 2005

10,123 citations recorded by the source corpus.

Subfields: Artificial Intelligence, Epidemiology, Health Information Management

View Paper: https://www.semanticscholar.org/paper/787c917d663c5dd8fad53fa3b18889d8e44cf695

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Citations in the corpus

Derivation and validation of an index to predict early death or unplanned readmission after discharge from hospital to the community (2010, methodology): “We calculated each patient’s Charlson comorbidity index score using the International Classification of Disease (ICD) codes cited by Quan and colleagues.(19) We linked to the National Ambulatory Care Reporting System to measure the number of visits to an emergency department by each patient in the s”
comorbidity: An R package for computing comorbidity scores (2018, methodology): “The implementation is based on the coding algorithms published by Quan et al . in 2005 (Quan et al. 2005).”
Assessment of Clinical Criteria for Sepsis (2016, neutral): “(%) infectede 6347 (4) 16 092 (5) 22 593 (6) 210 (18) 700 (11)”
The MIMIC Code Repository: enabling reproducibility in critical care research (2017, methodology): “27 Finally, Quan et al. 28 proposed an enhanced ICD-9 coding methodology based on examining inconsistencies among previous definitions.”
Sarcopenia is associated with postoperative infection and delayed recovery from colorectal cancer resection surgery (2012, methodology): “1)) who underwent a colorectal procedure (segmental or partial colectomy, hemicolectomy, subtotal or total colectomy, sigmoid colon resection, anterior resection or abdominoperineal resection) between April 1 2002 and March 31 2006.”
The economic burden of adults with major depressive disorder in the United States (2005 and 2010). (2015, methodology): “The 17 conditions included in the CCI were identified using ICD-9-CM diagnosis codes reported by Quan et al., 2005 21.”
Incidence and Mortality of Hip Fractures in the United States (2009, neutral): “85 7411 (32) 10 205 (36) 33 071 (40) 38 925 (46)”
Relation between kidney function, proteinuria, and adverse outcomes. (2010, methodology): “Other comorbid conditions were identified using validated International Classification of Diseases, Ninth Revision, Clinical Modification, and International Statistical Classification of Diseases, Tenth Revision (ICD-10), coding algorithms applied to physician claims and hospitalization data.(16) Th”
The Effects of Nurse Staffing and Nurse Education on Patient Deaths in Hospitals With Different Nurse Work Environments (2011, methodology): “Elixhauser et al’s(39) risk adjustment approach was used consisting of 27 comorbidities (excluding fluid and electrolyte disorders and coagulopathy).(40,41) Additional adjustments included sex, age, transfer status, and a series of 61 dummy variables indicating the type of surgery.”
Why summary comorbidity measures such as the Charlson Comorbidity Index and Elixhauser score work (2015, methodology): “Although initially developed for use with medical records data, the Charlson Comorbidity Index has been adapted for use with health claims data.(5,6,9) The validity of the Charlson Comorbidity Index as well as its adaptations have been investigated in multiple studies.”
Long-term Cognitive Impairment and Functional Disability Among Survivors of Severe Sepsis (2010, neutral): “Characteristics of the hospitalizations for severe sepsis were abstracted from the Medicare claims, including an organ dysfunction score (the sum of the number of organ failures of cardiovascular, neurologic, hematologic, hepatic, renal, or respiratory origin).(5,17)”