{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T03:49:43Z","timestamp":1777520983871,"version":"3.51.4"},"reference-count":37,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2024,4,6]],"date-time":"2024-04-06T00:00:00Z","timestamp":1712361600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100003243","name":"University Hospital Hradec Kralove","doi-asserted-by":"publisher","award":["UHHK, 00179906"],"award-info":[{"award-number":["UHHK, 00179906"]}],"id":[{"id":"10.13039\/501100003243","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001823","name":"The Ministry of Education, Youth and Sports","doi-asserted-by":"publisher","award":["90254"],"award-info":[{"award-number":["90254"]}],"id":[{"id":"10.13039\/501100001823","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Ann Clin Biochem"],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>The primary goal was to estimate reference values of parathyroid hormone (PTH) in very low birth weight infants without severe neonatal morbidity. A secondary objective was to assess the relationship between PTH serum levels and selected laboratory markers of bone metabolism.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Ninety two infants with birth weight less than 1500\u00a0g met the inclusion criteria of the study. Serum levels of PTH, 25-hydroxyvitamin-D [25(OH)D], C3-epi-25(OH)D, total calcium, phosphorus, and alkaline phosphatase, and urinary levels of calcium, phosphorus, and creatinine were examined on day 14 and subsequently every 2\u00a0weeks until discharge.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Of the total 167 serum samples examined for PTH levels in infants without 25(OH)D deficiency the estimated range was 0.9\u201311.9 pmol\/l (8.5\u2013112.3 pg\/mL). During the first month, no statistically significant correlation was observed between PTH level and that of 25(OH)D, C3-epimers of 25(OH)D, S-Ca, S-P, or ALP, nor with urinary excretion of calcium and phosphorus. From the second month of life, there was a moderately significant correlation between PTH and 25(OH)D (Rho = \u22120.40, P =&lt; .001), between PTH and calcium\/creatinine ratio (Rho = \u22120.56, P = &lt; .001), and between PTH and phosphorus\/creatinine ratio (Rho = 0.51, P = &lt; .001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The physiological range for PTH levels for preterm neonates without 25(OH)D deficiency was estimated as 0.9\u201311.9 pmol\/l (8.5\u2013112.3 pg\/mL). It seems that elevation of serum PTH above this range can be considered as hyperparathyroidism in very low birth weight infants.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/00045632241245942","type":"journal-article","created":{"date-parts":[[2024,3,23]],"date-time":"2024-03-23T03:54:00Z","timestamp":1711166040000},"page":"372-385","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":6,"title":["Reference values of parathyroid hormone in very low birth weight infants"],"prefix":"10.1177","volume":"61","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7359-9670","authenticated-orcid":false,"given":"Tomas","family":"Matejek","sequence":"first","affiliation":[{"name":"Department of Paediatrics, Charles University in Prague, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bara","family":"Zapletalova","sequence":"additional","affiliation":[{"name":"Department of Paediatrics, Charles University in Prague, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jaroslav","family":"Stranik","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Charles University in Prague, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lenka","family":"Zaloudkova","sequence":"additional","affiliation":[{"name":"Institute of Clinical Biochemistry and Diagnostics, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vladimir","family":"Palicka","sequence":"additional","affiliation":[{"name":"Institute of Clinical Biochemistry and Diagnostics, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2024,4,6]]},"reference":[{"key":"bibr1-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1016\/j.siny.2019.101076"},{"key":"bibr2-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1007\/s11914-011-0073-0"},{"key":"bibr3-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1080\/14767058.2018.1450858"},{"key":"bibr4-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1016\/j.siny.2020.101086"},{"key":"bibr5-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1016\/j.siny.2019.101069"},{"key":"bibr6-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1016\/j.siny.2019.101068"},{"key":"bibr7-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1136\/archdischild-2018-316330"},{"key":"bibr8-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1111\/j.1440-1754.2011.02019.x"},{"key":"bibr9-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1111\/jpc.12052"},{"key":"bibr10-00045632241245942","doi-asserted-by":"publisher","DOI":"10.4274\/Jcrpe.1282"},{"key":"bibr11-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1111\/ped.12961"},{"key":"bibr12-00045632241245942","doi-asserted-by":"publisher","DOI":"10.3390\/nu14163397"},{"key":"bibr13-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1038\/jp.2014.97"},{"key":"bibr14-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2013.10.089"},{"key":"bibr15-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1164\/ajrccm.163.7.2011060"},{"key":"bibr16-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1097\/00000658-197801000-00001"},{"key":"bibr17-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1002\/1098-2779(200102)7:1<56::AID-MRDD1008>3.0.CO;2-A"},{"key":"bibr18-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1080\/08035259850157435"},{"key":"bibr19-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1093\/ndt\/gfr614"},{"key":"bibr20-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinbiochem.2011.08.1134"},{"key":"bibr21-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinbiochem.2012.10.037"},{"key":"bibr22-00045632241245942","first-page":"3","volume":"47","author":"Craig A","year":"2011","journal-title":"Reporter (Supelco)"},{"key":"bibr23-00045632241245942","volume-title":"Neonatal nutrition and metabolism","author":"Hay WTP","year":"2006"},{"key":"bibr24-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1097\/MPG.0b013e3181adaee0"},{"key":"bibr25-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2013-0420"},{"key":"bibr26-00045632241245942","volume-title":"Defining, establishing, and verifying reference intervals in the clinical laboratory; approved guideline","author":"Horowitz GL","year":"2010"},{"key":"bibr27-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1007\/s40618-016-0553-2"},{"key":"bibr28-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1515\/cclm-2015-0314"},{"key":"bibr29-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1080\/17843286.2020.1769285"},{"key":"bibr30-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1080\/00365513.2022.2164517"},{"key":"bibr31-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1373\/clinchem.2013.204222"},{"key":"bibr32-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1080\/14767058.2019.1586873"},{"key":"bibr33-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1007\/s00431-023-04839-y"},{"key":"bibr34-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0165727"},{"key":"bibr35-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1515\/cclm-2022-1128"},{"key":"bibr36-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1515\/jpem.2004.17.7.959"},{"key":"bibr37-00045632241245942","doi-asserted-by":"publisher","DOI":"10.1186\/s13052-017-0361-0"}],"container-title":["Annals of Clinical Biochemistry: International Journal of Laboratory Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/00045632241245942","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/00045632241245942","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/00045632241245942","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T12:25:26Z","timestamp":1777379126000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/00045632241245942"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,4,6]]},"references-count":37,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2024,9]]}},"alternative-id":["10.1177\/00045632241245942"],"URL":"https:\/\/doi.org\/10.1177\/00045632241245942","relation":{},"ISSN":["0004-5632","1758-1001"],"issn-type":[{"value":"0004-5632","type":"print"},{"value":"1758-1001","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,4,6]]}}}