{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,29]],"date-time":"2026-08-29T04:17:48Z","timestamp":1787977068012,"version":"build-2784847793"},"reference-count":35,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T00:00:00Z","timestamp":1787875200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T00:00:00Z","timestamp":1787875200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100016999","name":"H\u00f8gskulen p\u00e5 Vestlandet","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100016999","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Paediatrica"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Aim<\/jats:title>\n                    <jats:p>This study examined age\u2010 and sex\u2010specific prevalence and trends in underweight among Norwegian children and adolescents during the pre\u2010pandemic period from 2010 to 2019 and COVID\u201019 pandemic period from 2020 to 2022.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Height and weight data from 78\u2009024 children aged 2 to 13\u2009years in Bergen from 2010 to 2022 were obtained from public health clinic and school health service records. Underweight grades 1 to 3 were defined using the International Obesity Task Force cut\u2010offs. Age\u2010 and sex\u2010specific prevalence was analysed longitudinally, and trends were assessed for boys and girls across age groups using regression analyses.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Underweight was most prevalent among 2\u2010year\u2010olds and declined with increasing age, more in girls than boys. Among girls, the prevalence decreased from 19.3% at age 2\u2009years to 6.2% at age 13\u2009years, and among boys from 13.3% to 8.6%. The interaction between sex and age was statistically significant. During the pre\u2010pandemic period, prevalence decreased significantly among 2\u2010year\u2010olds. During the pandemic period, increased prevalence of underweight was observed among 8\u2010year\u2010old girls.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Underweight remains a relevant public health concern, with clear age\u2010 and sex\u2010specific patterns. These findings highlight the need for continued monitoring and targeted follow\u2010up in early childhood.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/apa.70727","type":"journal-article","created":{"date-parts":[[2026,8,29]],"date-time":"2026-08-29T03:39:02Z","timestamp":1787974742000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Trends in Childhood Underweight in Norwegian Children: Data From Routine Child Healthcare, 2010\u20132022"],"prefix":"10.1111","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-2436-9838","authenticated-orcid":false,"given":"Sara\u2010Rebekka F\u00e6r\u00f8","family":"Linde","sequence":"first","affiliation":[{"name":"Department of Health and Caring Sciences Western Norway University of Applied Sciences  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6340-4593","authenticated-orcid":false,"given":"Roy Miodini","family":"Nilsen","sequence":"additional","affiliation":[{"name":"Department of Health and Caring Sciences Western Norway University of Applied Sciences  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3749-0475","authenticated-orcid":false,"given":"Mathieu","family":"Roelants","sequence":"additional","affiliation":[{"name":"Department of Public Health and Primary Care KU Leuven, University of Leuven  Leuven Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9878-0927","authenticated-orcid":false,"given":"Melissa R.","family":"Balthasar","sequence":"additional","affiliation":[{"name":"Department of Paediatrics and Adolescents Stavanger University Hospital  Stavanger Norway"},{"name":"Department of Clinical Science University of Bergen  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9649-6615","authenticated-orcid":false,"given":"Jennifer L.","family":"Baker","sequence":"additional","affiliation":[{"name":"Center for Clinical Research and Prevention Copenhagen University Hospital \u2013 Bispebjerg and Frederiksberg  Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2227-323X","authenticated-orcid":false,"given":"Dorthe C.","family":"Pedersen","sequence":"additional","affiliation":[{"name":"Center for Clinical Research and Prevention Copenhagen University Hospital \u2013 Bispebjerg and Frederiksberg  Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3805-1615","authenticated-orcid":false,"given":"Boye","family":"Welde","sequence":"additional","affiliation":[{"name":"Department of Child and Adolescent Health Promotion Services Norwegian Institute of Public Health  Levanger Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9954-171X","authenticated-orcid":false,"given":"Marjolein M.","family":"Iversen","sequence":"additional","affiliation":[{"name":"Faculty of Health and Social Sciences Western Norway University of Applied Sciences  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7064-1407","authenticated-orcid":false,"given":"Petur B.","family":"Juliusson","sequence":"additional","affiliation":[{"name":"Department of Clinical Science University of Bergen  Bergen Norway"},{"name":"Department of Health Registry Research and Development Norwegian Institute of Public Health  Bergen Norway"},{"name":"Department of Paediatrics and Adolescent Medicine Haukeland University Hospital  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne\u2010Siri","family":"Fismen","sequence":"additional","affiliation":[{"name":"Department of Health and Caring Sciences Western Norway University of Applied Sciences  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,28]]},"reference":[{"key":"e_1_2_13_2_1","doi-asserted-by":"crossref","DOI":"10.1001\/jamanetworkopen.2022.24417","article-title":"Underweight in the First 2\u2009Years of Life and Growth in Later Childhood","volume":"5","author":"South C. 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