The effect of the transition from the ninth to the tenth revision of the International Classification of Diseases on external cause registration of injury morbidity in Sweden
Abstract
Background: Revisions of the International Classification of Diseases (ICD) have previously been shown to cause dramatic effects with regard to injury mortality data when implemented. However, limited knowledge exists on the effects on the coding of external causes of injury morbidity, despite this being an important aspect with regard to injury prevention. Method: Hospitalised injuries in Sweden were studied using time series intervention analysis to observe the effect of the ICD change from ICD-9 to ICD-10 in 1997 on external cause coding. Results: The results would suggest considerable coding issues with a large spike in the proportion of injury admissions registered without an external cause code in 1997, with continuing, although gradually diminishing, problems up to 2002. The coding change seems to have had an immediate effect on all external cause of injury categories, although the categories that were not directly convertible from ICD-9 to ICD-10 were seemingly more greatly affected. Discussion: The study illustrates the potential issues associated with changes between ICD revisions and the importance of data quality control both during surveillance and collection of data, but also when presenting injury trends across ICD versions.
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Changes in versions of code classification systems (e.g., from ICD-9 to ICD-10) may alter the validity of ascertainment using coded data.
“In addition, changes in versions of code classification systems (e.g., from International Classification of Diseases (ICD)-9 to ICD-10) may alter the validity of ascertainment using coded data [65,66].”
From The Reporting of Studies Conducted Using Observational Routinely-Collected Health Data (RECORD) statement. (2015) · cites this paper as [65]
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- Authors
- Nilson, F., Bonander, C., & Andersson, R.
- Affiliations
- Karlstad University (SE)
- Corresponding author
- Nilson, Finn
- Venue
- Injury Prevention
- Publisher
- BMJ
- Published
- 2014-10-24
- Volume
- 21
- Issue
- 3
- Pages
- 189-194
- ISSN
- 1353-8047 (ISSN-L)
- 1475-5785
- OpenAlex
- W2166051937
- Cited by
- 14
- References
- 22
- Citations by year
- 2026: 1 · 2024: 1 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 1 · 2016: 1 · 2015: 4
- FWCI
- 3.04
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Injury Prevention (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Health Professions › Health Information Management › Medical Coding and Health Information
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Injury Epidemiology and Prevention
- Health Sciences › Medicine › Emergency Medicine › Trauma and Emergency Care Studies
- Keywords
- ICD-10, ICD-9, external causes of injury, trauma morbidity, injury surveillance, data quality control, Sweden
- MeSH terms
- Female, Humans, Sweden, Wounds and Injuries, International Classification of Diseases
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