ArticleEuropean journal of epidemiology2023
A unidirectional mapping of ICD-8 to ICD-10 codes, for harmonized longitudinal analysis of diseases.
Article in European journal of epidemiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
18 citing papers in PubMed.
- Socioeconomic Inequality and Major Adverse Cardiovascular Events.JAMA network open · 2026Article
- Genetic architecture of cytokine autoantibodies and associated risk of common diseases.Nature communications · 2026Article
- Long-term exposure to air pollution and chronic kidney disease incidence in adults: The Danish Nurse Cohort.Journal of exposure science & environmental epidemiology · 2026Article
- Genetic confounding in the associations between maternal health and autism.medRxiv : the preprint server for health sciences · 2026Article
- Mapping the heritability of disease: a nationwide study.Nature communications · 2026Article
- Psychiatric and somatic morbidity patterns among patients diagnosed with anorexia nervosa and the risk of involuntary treatment: register-based cohort study.The British journal of psychiatry : the journal of mental science · 2026Article
- Mapping Different Versions of the International Classification of Diseases: A Scoping Review.International journal of population data science · 2026Article
- Article
- Exploring nationwide patterns of sleep problems from late adolescence to adulthood using machine learning.Science advances · 2025Article
- Risk of Death, Infections, and Hyperthermia in Ectodermal Dysplasias: A Nationwide Study.Acta dermato-venereologica · 2025Article
- Cohort profile: Copenhagen Hospital Biobank-chronic inflammatory disease-inflammatory bowel disease (CHB-CID:IBD) genetic cohort.European journal of epidemiology · 2025Article
- Clinical Terminology Mapping Service Based on Information Retrieval.Methods of information in medicine · 2025Article
- Pre-existing morbidity pattern in a Danish testicular cancer cohort: insights beyond the testicular dysgenesis syndrome hypothesis.Human reproduction open · 2025Article
- Mental Disorders in Danish Hospital Registers: A Review of Content and Possibilities for Epidemiological Research.Clinical epidemiology · 2025Review
- Uncovering the heritable components of multimorbidities and disease trajectories using a nationwide cohort.Nature communications · 2024Article
- Stratification of Kidney Transplant Recipients Into Five Subgroups Based on Temporal Disease Trajectories.Transplantation direct · 2024Article
- Impact of mechanical ventilation on clinical outcomes in ICU-admitted Alzheimer's disease patients: a retrospective cohort study.Frontiers in public health · 2024Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
12 authors.
Funding
Abstract
Periodic revisions of the international classification of diseases (ICD) ensure that the classification reflects new practices and knowledge; however, this complicates retrospective research as diagnoses are coded in different versions. For longitudinal disease trajectory studies, a crosswalk is an essential tool and a comprehensive mapping between ICD-8 and ICD-10 has until now been lacking. In this study, we map all ICD-8 morbidity codes to ICD-10 in the expanded Danish ICD version. We mapped ICD-8 codes to ICD-10, using a many-to-one system inspired by general equivalence mappings such that each ICD-8 code maps to a single ICD-10 code. Each ICD-8 code was manually and unidirectionally mapped to a single ICD-10 code based on medical setting and context. Each match was assigned a score (1 of 4 levels) reflecting the quality of the match and, if applicable, a "flag" signalling choices made in the mapping. We provide the first complete mapping of the 8596 ICD-8 morbidity codes to ICD-10 codes. All Danish ICD-8 codes representing diseases were mapped and 5106 (59.4%) achieved the highest consistency score. Only 334 (3.9%) of the ICD-8 codes received the lowest mapping consistency score. The mapping provides a scaffold for translation of ICD-8 to ICD-10, which enable longitudinal disease studies back to and 1969 in Denmark and to 1965 internationally with further adaption.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.