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Bronchopulmonary dysplasia—impact of severity and timing of diagnosis on neurodevelopment of preterm infants: a retrospective cohort study


Malavolti, Anna Maria; Bassler, Dirk; Arlettaz-Mieth, Romaine; Faldella, Giacomo; Latal, Beatrice; Natalucci, Giancarlo (2018). Bronchopulmonary dysplasia—impact of severity and timing of diagnosis on neurodevelopment of preterm infants: a retrospective cohort study. BMJ Paediatrics Open, 2:e000165.

Abstract

Objective To assess the contribution of the severity of bronchopulmonary dysplasia (BPD) and the time point of its diagnosis to the prediction of neurodevelopmental impairment (NDI) at corrected age of 2 years in preterm infants.
Design Retrospective cohort study.
Setting Level-III perinatal centre.
Patients and outcome measures Infants born in 2000–2013 with gestational age <30 weeks. BPD was defined as FiO2 >21% for ≥28 days and its severity classified as mild, FiO2=21%; moderate, FiO2 <30% and severe, FiO2 ≥30% and/or positive pressure support. We applied these criteria at two time points: 36 and 40 weeks’ postmenstrual age (PMA). Multivariable regression models were used to estimate the association (OR (95% CI)) between BPD characteristics and NDI defined as cognitive or motor development score <2 SD; severe cerebral palsy; deafness and blindness.
Results Of 610 (81% of cohort) children assessed at 2 years, 357 (58%) had BPD and 98 (16%) had NDI. Neither FiO2 >21% for ≥28 days nor mild or moderate BPD at either 36 or 40 weeks’ PMA was associated with NDI, but severe BPD was (at 36 weeks’ PMA 5.6 (2.0 to 16.0) and at 40 weeks’ PMA 16.6 (4.6 to 59.9)). Infants with severe BPD at both 36 and 40 weeks’ PMA had lower mental (mean difference −11.4 (−18.5 to −4.3), −25.7(−35.9 to −15.5), respectively) and motor (−7.8 (−14.9 to −0.6), −20.1(−30.7 to −9.5), respectively),developmental scores than infants without BPD.
Conclusion In this cohort, severe BPD was a better independent predictor of NDI at 2 years than mild or moderate BPD. BPD diagnosed at 40 weeks’ PMA might allow better identification of infants at highest risk for NDI.

Abstract

Objective To assess the contribution of the severity of bronchopulmonary dysplasia (BPD) and the time point of its diagnosis to the prediction of neurodevelopmental impairment (NDI) at corrected age of 2 years in preterm infants.
Design Retrospective cohort study.
Setting Level-III perinatal centre.
Patients and outcome measures Infants born in 2000–2013 with gestational age <30 weeks. BPD was defined as FiO2 >21% for ≥28 days and its severity classified as mild, FiO2=21%; moderate, FiO2 <30% and severe, FiO2 ≥30% and/or positive pressure support. We applied these criteria at two time points: 36 and 40 weeks’ postmenstrual age (PMA). Multivariable regression models were used to estimate the association (OR (95% CI)) between BPD characteristics and NDI defined as cognitive or motor development score <2 SD; severe cerebral palsy; deafness and blindness.
Results Of 610 (81% of cohort) children assessed at 2 years, 357 (58%) had BPD and 98 (16%) had NDI. Neither FiO2 >21% for ≥28 days nor mild or moderate BPD at either 36 or 40 weeks’ PMA was associated with NDI, but severe BPD was (at 36 weeks’ PMA 5.6 (2.0 to 16.0) and at 40 weeks’ PMA 16.6 (4.6 to 59.9)). Infants with severe BPD at both 36 and 40 weeks’ PMA had lower mental (mean difference −11.4 (−18.5 to −4.3), −25.7(−35.9 to −15.5), respectively) and motor (−7.8 (−14.9 to −0.6), −20.1(−30.7 to −9.5), respectively),developmental scores than infants without BPD.
Conclusion In this cohort, severe BPD was a better independent predictor of NDI at 2 years than mild or moderate BPD. BPD diagnosed at 40 weeks’ PMA might allow better identification of infants at highest risk for NDI.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Neonatology
04 Faculty of Medicine > University Children's Hospital Zurich > Medical Clinic
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:1 January 2018
Deposited On:09 Oct 2018 13:37
Last Modified:29 Jan 2019 13:01
Publisher:BMJ Publishing Group
ISSN:2399-9772
OA Status:Green
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.1136/bmjpo-2017-000165
PubMed ID:29637181

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