Hospitalizations for respiratory syncytial virus bronchiolitis in preterm infants at <33 weeks gestation without bronchopulmonary dysplasia: the CASTOR study

Abstract : This study was conducted during the 2008-2009 respiratory syncytial virus (RSV) season in France to compare hospitalization rates for bronchiolitis (RSV-confirmed and all types) between very preterm infants (\textless33 weeks' gestational age, WGA) without bronchopulmonary dysplasia and full-term infants (39-41 WGA) matched for date of birth, gender and birth location, and to evaluate the country-specific risk factors for bronchiolitis hospitalization. Data on hospitalizations were collected both retrospectively and prospectively for 498 matched infants (249 per group) aged \textless6 months at the beginning of the RSV season. Compared to full-term infants, preterm infants had a fourfold [95% confidence interval (CI) 1·36-11·80] and a sevenfold (95% CI 2·79-17·57) higher risk of being hospitalized for bronchiolitis, RSV-confirmed and all types, respectively. Prematurity was the only factor that significantly increased the risk of being hospitalized for bronchiolitis. The risk of multiple hospitalizations for bronchiolitis in the same infant significantly increased with male gender and the presence of siblings aged ⩾2 years.
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Epidemiology and Infection, Cambridge University Press (CUP), 2013, 141 (4), pp.816--826. 〈10.1017/S0950268812001069〉
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Jean-Bernard Gouyon, J.-C. Roze, C. Guillermet-Fromentin, I. Glorieux, L. Adamon, et al.. Hospitalizations for respiratory syncytial virus bronchiolitis in preterm infants at <33 weeks gestation without bronchopulmonary dysplasia: the CASTOR study. Epidemiology and Infection, Cambridge University Press (CUP), 2013, 141 (4), pp.816--826. 〈10.1017/S0950268812001069〉. 〈hal-01194211〉

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