Résumé
Background: One course of antenatal corticosteroids reduces the risk of respiratory distress syndrome and neonatal death. Weekly doses given to women who remain undelivered after a single course may have benefits (less respiratory morbidity) or cause harm (reduced growth in utero). We aimed to find out whether multiple courses of antenatal corticosteroids would reduce neonatal morbidity and mortality without adversely affecting fetal growth. Methods: 1858 women at 25-32 weeks' gestation who remained undelivered 14-21 days after an initial course of antenatal corticosteroids and continued to be at high risk of preterm birth were randomly assigned to multiple courses of antenatal corticosteroids (n=937) or placebo (n=921), every 14 days until week 33 or delivery, whichever came first. The primary outcome was a composite of perinatal or neonatal mortality, severe respiratory distress syndrome, intraventricular haemorrhage (grade III or IV), periventricular leucomalacia, bronchopulmonary dysplasia, or necrotising enterocolitis. Analysis was by intention to treat. All patients and caregivers were unaware of the treatment given. This trial is registered as number ISRCTN2654148. Findings: Infants exposed to multiple courses of antenatal corticosteroids had similar morbidity and mortality to those exposed to placebo (150 [12·9%] vs 143 [12·5%]). Those receiving multiple doses of corticosteroids also weighed less at birth than those exposed to placebo (2216 g vs 2330 g, p=0·0026), were shorter (44·5 cm vs 45·4 cm, p<0·001), and had a smaller head circumference (31·1 cm vs 31·7 cm, p<0·001). Interpretation: Multiple courses of antenatal corticosteroids, every 14 days, do not improve preterm-birth outcomes, and are associated with a decreased weight, length, and head circumference at birth. Therefore, this treatment schedule is not recommended. Funding: Canadian Institutes of Health Research.
Langue d'origine | English |
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Pages (de-à) | 2143-2151 |
Nombre de pages | 9 |
Journal | The Lancet |
Volume | 372 |
Numéro de publication | 9656 |
DOI | |
Statut de publication | Published - déc. 20 2008 |
Note bibliographique
Funding Information:MACS was funded by the Canadian Institutes of Health Research (CIHR). CIHR had no role in the design, management, data collection, analysis, or interpretation of the data. CIHR had no role in the writing of the manuscript or in the decision to submit for publication. All authors had full access to the data. KEM had final responsibility for the decision to submit the paper for publication.
Funding Information:
We thank all participants in the MACS trial; Caroline Crowther and Ron Wapner for their collaboration and support; the members of our data safety monitoring board for their guidance; and all the staff at the Maternal, Infant and Reproductive Health Research Unit in Toronto for their dedication and hard work. MACS was supported by a grant from the Canadian Institutes for Health Research (grant number MCT 38142). The data coordinating centre was supported by grants from Sunnybrook Health Sciences Centre, Women's College Hospital and the Department of Obstetrics and Gyneacology at the University of Toronto. Betamethasone and placebo were purchased from Schering-Plough Corporation (Madison, NJ, USA) and Eminent Services Corporation (Gaithersburg, MD, USA), respectively.
ASJC Scopus Subject Areas
- General Medicine