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Mid-childhood bone mass after exposure to repeat doses of antenatal glucocorticoids: a randomized trial

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dc.contributor.authorMcKinlay, C.
dc.contributor.authorCutfield, W.
dc.contributor.authorBattin, M.
dc.contributor.authorDalziel, S.
dc.contributor.authorCrowther, C.
dc.contributor.authorHarding, J.
dc.date.issued2017
dc.description.abstractBACKGROUND AND OBJECTIVE: Treatment of women at risk for preterm birth with repeat doses of glucocorticoids reduces neonatal morbidity, but could have adverse effects on skeletal development. We assessed whether exposure to repeat antenatal betamethasone alters bone mass in children whose mothers participated in the Australasian Collaborative Trial of Repeat Doses of Corticosteroids. METHODS: Women were randomized to a single dose of betamethasone or placebo, ≥7 days after an initial course of glucocorticoids, repeated each week that they remained at risk for preterm birth at <32 weeks’ gestation. In this follow-up study, children underwent whole-body dual-energy radiograph absorptiometry at 6 to 8 years’ corrected age. RESULTS: Of 212 eligible childhood survivors, 185 were studied (87%; 91 repeat betamethasone group; 94 placebo [single course] group). Children exposed to repeat antenatal betamethasone and those exposed to placebo had similar whole-body bone mineral content (median repeat betamethasone: 553 g, interquartile range: 442–712 g; placebo: 567 g, interquartile range: 447–750 g; geometric mean ratio: 0.99; 95% confidence interval: 0.94–1.03, P = .55) and bone area (median repeat betamethasone 832 cm2, interquartile range: 693–963 cm2; placebo: 822 cm2, interquartile range: 710–1020 cm2; geometric mean ratio: 0.99, 95% confidence interval: 0.92–1.07, P = .75). CONCLUSIONS: Exposure to repeat doses of antenatal betamethasone compared with a single course of glucocorticoids does not alter bone mass in mid-childhood.
dc.description.statementofresponsibilityChristopher J.D. McKinlay, Wayne S. Cutfield, Malcolm R. Battin, Stuart R. Dalziel, Caroline A. Crowther, Jane E. Harding for the ACTORDS Follow-up Group
dc.identifier.citationPediatrics, 2017; 139(5):e20164250-1-e20164250-11
dc.identifier.doi10.1542/peds.2016-4250
dc.identifier.issn0031-4005
dc.identifier.issn1098-4275
dc.identifier.orcidCrowther, C. [0000-0002-9079-4451]
dc.identifier.urihttp://hdl.handle.net/2440/105600
dc.language.isoen
dc.publisherAmerican Academy of Pediatrics
dc.rightsCopyright © 2017 by the American Academy of Pediatrics
dc.source.urihttps://doi.org/10.1542/peds.2016-4250
dc.subjectFetus/newborn infant; fetus/newborn infant; neonatology; gynecology; gynecology; maternal and fetal medicine
dc.titleMid-childhood bone mass after exposure to repeat doses of antenatal glucocorticoids: a randomized trial
dc.typeJournal article
pubs.publication-statusPublished

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