ArticleEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin2025
Surveillance of severe acute respiratory infections using ICD-10 diagnosis codes and national electronic health records, Denmark, 2022 to 2024.
Article in Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Causes and Contributing Factors of In-Hospital and Post-Discharge Mortality Among Patients With Severe Acute Respiratory Infection in Low- and Middle-Income Countries: A Scoping Review.Health science reports · 2026Article
- Association between albumin-corrected anion gap and 28-day mortality in critically ill patients with pneumonia in the intensive care unit: evidence from the medical information mart for intensive care IV database.BMC pulmonary medicine · 2026Observational
- Reconstructing severe acute respiratory infection dynamics from ICD-10 hospital discharge data: a 10-year analysis of 11.2 million discharges in Ecuador, 2014-2023.Frontiers in public health · 2026Article
- Short-term and long-term risk of death and readmission among adults aged 50+ years admitted with severe acute respiratory infections due to COVID-19, influenza or RSV in Denmark, 2022-2025.BMJ public health · 2026Article
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Authors and funding
5 authors.
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Abstract
BACKGROUNDThe COVID-19 pandemic underscored the need and value of a standardised and timely surveillance system for severe acute respiratory infections (SARI) to inform epidemic preparedness and response.AIMWe aimed to develop an automated SARI surveillance system using electronic health records retrieved from pre-existing national health registers in Denmark.METHODSWe used the Danish Civil Register, the Danish National Patient Register and the Danish Microbiology Database to set up the system. First, we determined a SARI case definition for surveillance, choosing among six different potentially usable combinations of ICD-10 diagnosis codes by exploring how each combination captured patient characteristics (age, hospital admission length, mortality, laboratory tests and seasonality). Second, using this case definition, we evaluated the surveillance system's timeliness and completeness by comparing weekly data reported with a delay of 1, 8, 15, 22 and 29 days, respectively, against a complete set of data extracted after 120 days.RESULTSThe selected case definition combined ICD-10 codes for influenza (J09-J11), acute lower viral and bacterial respiratory tract infections and bronchiolitis (J12-J22) and COVID-19 (B342A and B972A). With regards to timeliness and completeness of this definition, weekly data reported with a delay of 8 days was 89-93% complete and showed very similar patterns in weekly changes in SARI cases as data reported after 120 days.CONCLUSIONOur SARI surveillance system detected fluctuations in weekly SARI cases in a consistent and timely manner. We recommend countries to explore using electronic health registers as a resource-efficient alternative to standard SARI sentinel surveillance.
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