ArticleBMC infectious diseases2020
Risk conditions in children hospitalized with influenza in Norway, 2017-2019.
Article in BMC infectious diseases, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 21 papers.
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Who cites it
21 citing papers in PubMed, 40 citations in OpenAlex.
- Development and internal validation of a nomogram for predicting referral or hospitalization risk in children with community-acquired influenza.Frontiers in pediatrics · 2026Article
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- Congenital Heart Defects and Concurrent Diagnoses in Influenza Hospitalization in the Pediatric Health Information System Study, 2004-2019.Pediatric cardiology · 2025Article
- Clinical Burden of Pediatric Influenza A and B in Malaysia: Outcomes and Resource Utilization in A Tropical Setting.Infection & chemotherapy · 2025Article
- Characteristics of children with influenza admitted to a pediatric hospital in Greece during the 2022/2023 and 2023/2024 seasons.European journal of pediatrics · 2025Observational
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- Physicians' Intentions to Recommend Influenza Vaccine: A Multi-Centered Hospital-Based Study Using the Theory of Planned Behavior in Bangladesh.International journal of environmental research and public health · 2025Article
- Influenza in hospitalized pediatric patients in Poland: a retrospective single-center study of the 2023/2024 epidemic season.Archives of medical science : AMS · 2025Article
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- Uncovering the burden of Influenza in children in Portugal, 2008-2018.BMC infectious diseases · 2024Review
- Severe Respiratory Disease Among Children With and Without Medical Complexity During the COVID-19 Pandemic.JAMA network open · 2023Article
- In-hospital outcomes in patients with and without epilepsy diagnosed with COVID-19-A cohort study.Epilepsia · 2023Article
- No association between inactivated influenza vaccination and influenza viral load at diagnosis among young Japanese children: An observational study of the 2013/2014 through 2017/2018 influenza seasons.Influenza and other respiratory viruses · 2023Observational
- Influenza versus other respiratory viruses - assessing severity among hospitalised children, Belgium, 2011 to 2020.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2023Observational
- Ferret model to mimic the sequential exposure of humans to historical H3N2 influenza viruses.Vaccine · 2023Article
- The convergent evolution of influenza A virus: Implications, therapeutic strategies and what we need to know.Current research in microbial sciences · 2023Article
- Influenza risk groups in Norway by education and employment status.Scandinavian journal of public health · 2022Article
- Hospitalization of Children Aged <5 Years Due to Influenza: Study Based on the National Hospitalization RegistryChildren (Basel, Switzerland) · 2022Article
- The burden of hospital-attended influenza in Norwegian children.Frontiers in pediatrics · 2022Article
Corrections and comments
- Erratum issued
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundNorwegian children are more frequently hospitalized with influenza than adults. Little is known about the characteristics of these children. Our aim was to investigate the presence of pre-existing risk conditions and to determine the duration of influenza hospitalizations in children during two influenza seasons.
methodsThe Norwegian Patient Registry holds data on all hospitalized patients in Norway. We included all patients younger than 18 years hospitalized with a diagnosis of influenza during the influenza seasons 2017-18 and 2018-19. Pre-existing risk conditions for influenza were identified by ICD-10 diagnoses in the Norwegian Patient Registry. In addition, information on asthma diagnoses were also retrieved from the Norwegian Registry for Primary Health Care. To estimate the prevalence of risk conditions in the child population, we obtained diagnoses on all Norwegian children in a two-year period prior to each influenza season. We calculated age-specific rates for hospitalization and risk for being hospitalized with influenza in children with risk conditions.
resultsIn total, 1013 children were hospitalized with influenza during the two influenza seasons. Children younger than 6 months had the highest rate of hospitalization, accounting for 13.5% of all admissions (137 children). Hospitalization rates decreased with increasing age. Among children hospitalized with influenza, 25% had one or more pre-existing risk conditions for severe influenza, compared to 5% in the general population under 18 years. Having one or more risk conditions significantly increased the risk of hospitalization, (Odds Ratio (OR) 6.1, 95% confidence interval (CI) 5.0-7.4 in the 2017-18 season, and OR 6.8, 95% CI 5.4-8.4 in the 2018-19 season). Immunocompromised children and children with epilepsy had the highest risk of hospitalization with influenza, followed by children with heart disease and lung disease. The average length of stay in hospital were 4.6 days, and this did not differ with age.
conclusionChildren with pre-existing risk conditions for influenza had a higher risk of hospitalization for influenza. However, most children (75%) admitted to hospital with influenza in Norway during 2017-2019 did not have pre-existing risk conditions. Influenza vaccination should be promoted in particular for children with risk conditions and pregnant women to protect new-borns.
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