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Adaptation of the charlson comorbidity index for register-based research in sweden

Ludvigsson, Jonas F. ; Appelros, Peter ; Askling, Johan ; Byberg, Liisa ; Carrero, Juan Jesus ; Ekström, Anna Mia ; Ekström, Magnus ; Smedby, Karin Ekström ; Hagström, Hannes and James, Stefan , et al. (2021) In Clinical Epidemiology 13. p.21-41
Abstract

Purpose: Comorbidity indices are often used to measure comorbidities in register-based research. We aimed to adapt the Charlson comorbidity index (CCI) to a Swedish setting. Methods: Four versions of the CCI were compared and evaluated by disease-specific experts. Results: We created a cohesive coding system for CCI to 1) harmonize the content between different international classification of disease codes (ICD-7,8,9,10), 2) delete incorrect codes, 3) enhance the distinction between mild, moderate or severe disease (and between diabetes with and without end-organ damage), 4) minimize duplication of codes, and 5) briefly explain the meaning of individual codes in writing. Conclusion: This work may provide an integrated and efficient... (More)

Purpose: Comorbidity indices are often used to measure comorbidities in register-based research. We aimed to adapt the Charlson comorbidity index (CCI) to a Swedish setting. Methods: Four versions of the CCI were compared and evaluated by disease-specific experts. Results: We created a cohesive coding system for CCI to 1) harmonize the content between different international classification of disease codes (ICD-7,8,9,10), 2) delete incorrect codes, 3) enhance the distinction between mild, moderate or severe disease (and between diabetes with and without end-organ damage), 4) minimize duplication of codes, and 5) briefly explain the meaning of individual codes in writing. Conclusion: This work may provide an integrated and efficient coding algorithm for CCI to be used in medical register-based research in Sweden.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Charlson comorbidity score, Comorbidity, Disease, Epidemiology, Public health, Sweden
in
Clinical Epidemiology
volume
13
pages
21 pages
publisher
Dove Medical Press Ltd.
external identifiers
  • pmid:33469380
  • scopus:85099720348
ISSN
1179-1349
DOI
10.2147/CLEP.S282475
language
English
LU publication?
yes
id
b9e1dd1d-acea-46f7-adfe-0c90e0360ee6
date added to LUP
2021-02-04 10:17:04
date last changed
2025-03-07 08:47:14
@article{b9e1dd1d-acea-46f7-adfe-0c90e0360ee6,
  abstract     = {{<p>Purpose: Comorbidity indices are often used to measure comorbidities in register-based research. We aimed to adapt the Charlson comorbidity index (CCI) to a Swedish setting. Methods: Four versions of the CCI were compared and evaluated by disease-specific experts. Results: We created a cohesive coding system for CCI to 1) harmonize the content between different international classification of disease codes (ICD-7,8,9,10), 2) delete incorrect codes, 3) enhance the distinction between mild, moderate or severe disease (and between diabetes with and without end-organ damage), 4) minimize duplication of codes, and 5) briefly explain the meaning of individual codes in writing. Conclusion: This work may provide an integrated and efficient coding algorithm for CCI to be used in medical register-based research in Sweden.</p>}},
  author       = {{Ludvigsson, Jonas F. and Appelros, Peter and Askling, Johan and Byberg, Liisa and Carrero, Juan Jesus and Ekström, Anna Mia and Ekström, Magnus and Smedby, Karin Ekström and Hagström, Hannes and James, Stefan and Järvholm, Bengt and Michaelsson, Karl and Pedersen, Nancy L. and Sundelin, Helene and Sundquist, Kristina and Sundström, Johan}},
  issn         = {{1179-1349}},
  keywords     = {{Charlson comorbidity score; Comorbidity; Disease; Epidemiology; Public health; Sweden}},
  language     = {{eng}},
  pages        = {{21--41}},
  publisher    = {{Dove Medical Press Ltd.}},
  series       = {{Clinical Epidemiology}},
  title        = {{Adaptation of the charlson comorbidity index for register-based research in sweden}},
  url          = {{http://dx.doi.org/10.2147/CLEP.S282475}},
  doi          = {{10.2147/CLEP.S282475}},
  volume       = {{13}},
  year         = {{2021}},
}