{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T09:39:33Z","timestamp":1773394773727,"version":"3.50.1"},"reference-count":30,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2021,9,5]],"date-time":"2021-09-05T00:00:00Z","timestamp":1630800000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Paediatrica"],"published-print":{"date-parts":[[2022,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>This study retrospectively evaluated the effectiveness and safety of a local hospital protocol of vitamin D supplementation for preterm infants, which was modified in 2016.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We focussed on 99 preterm infants born before 31\u00a0weeks of gestation and admitted to the neonatal intensive care unit at the Femme Mere Enfant Hospital, Bron, France, from 1\u00a0January to 31 December 2018. Calcium and urinary calcium were measured, and 25\u2010hydroxy vitamin D (25(OH)D) levels were monitored monthly and supplementation was adjusted, with 50\u2013120\u00a0nmol\/L considered normal. The results are presented as medians and interquartile ranges.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The infants were enrolled at a gestational age of 28.0 [26.9\u201329.1]\u00a0weeks and birth weight of 960 [800\u20131160]\u00a0g. When they were discharged at 37.3 [35.2\u201339.8]\u00a0weeks, the overall 25(OH)D level was 98 [79\u2013140]\u00a0nmol\/L: 4% had low levels, 63% had normal levels and 33% had high levels. Vitamin D supplementation was withdrawn for 60% more than one month before discharge. Rickets or fractures were not reported.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The modified protocol limited underdosing and significant overdosing, but moderate hypervitaminosis D was still frequent. Urgent studies are needed to determine the optimal supplementation and clinical impact of 25(OH)D on comorbidities in preterm infants.<\/jats:p><\/jats:sec>","DOI":"10.1111\/apa.16088","type":"journal-article","created":{"date-parts":[[2021,8,30]],"date-time":"2021-08-30T18:39:52Z","timestamp":1630348792000},"page":"76-85","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Local protocol helped to deliver vitamin D levels more accurately in preterm infants"],"prefix":"10.1111","volume":"111","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5967-7257","authenticated-orcid":false,"given":"Mauras","family":"Mathilde","sequence":"first","affiliation":[{"name":"Service de N\u00e9phrologie Rhumatologie et Dermatologie P\u00e9diatriques Hospices Civils de Lyon H\u00f4pital Femme M\u00e8re Enfant Bron 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