IMPORTANCE: Perinatal infections are commonly present in preterm and very low-birth-weight (VLWB) infants and might contribute to adverse neurodevelopmental outcome. OBJECTIVE: To summarize studies evaluating the effect of perinatal infections on neurodevelopmental outcome in very preterm/VLBW infants. EVIDENCE REVIEW: On December 12, 2011, we searched Medline, PsycINFO, Embase, and Web of Knowledge for studies on infections and neurodevelopmental outcome. All titles and abstracts were assessed for eligibility by 2 independent reviewers. We also screened the reference lists of identified articles to search for additional eligible studies. Preselected criteria justified inclusion in this meta-analysis: (1) the study included infants born very preterm (≤32 weeks) and/or with VLBW (≤1500 g); (2) the study compared infants with and without perinatal infection; (3) there was follow-up using the Bayley Scales of Infant Development 2nd edition; and (4) results were published in an English-language peer-reviewed journal. The quality of each included study was assessed using the Newcastle-Ottawa Scale. FINDINGS: This meta-analysis includes 18 studies encompassing data on 13.755 very preterm/VLBW infants. Very preterm/VLBW infants with perinatal infections had poorer mental (d = -0.25; P < .001) and motor (d = -0.37; P < .001) development compared with very preterm/VLBW infants without infections. Mental development was most impaired by necrotizing enterocolitis (d = -0.40; P < .001) and meningitis (d = -0.37; P < .001). Motor development was most impaired by necrotizing enterocolitis (d = -0.66; P < .001). Chorioamnionitis did not affect mental (d = -0.05; P = .37) or motor (d = 0.19; P = .08) development. CONCLUSIONS AND RELEVANCE: Postnatal infections have detrimental effects on mental and motor development in very preterm/VLBW infants.
IMPORTANCE: Perinatal infections are commonly present in preterm and very low-birth-weight (VLWB) infants and might contribute to adverse neurodevelopmental outcome. OBJECTIVE: To summarize studies evaluating the effect of perinatal infections on neurodevelopmental outcome in very preterm/VLBW infants. EVIDENCE REVIEW: On December 12, 2011, we searched Medline, PsycINFO, Embase, and Web of Knowledge for studies on infections and neurodevelopmental outcome. All titles and abstracts were assessed for eligibility by 2 independent reviewers. We also screened the reference lists of identified articles to search for additional eligible studies. Preselected criteria justified inclusion in this meta-analysis: (1) the study included infants born very preterm (≤32 weeks) and/or with VLBW (≤1500 g); (2) the study compared infants with and without perinatal infection; (3) there was follow-up using the Bayley Scales of Infant Development 2nd edition; and (4) results were published in an English-language peer-reviewed journal. The quality of each included study was assessed using the Newcastle-Ottawa Scale. FINDINGS: This meta-analysis includes 18 studies encompassing data on 13.755 very preterm/VLBW infants. Very preterm/VLBW infants with perinatal infections had poorer mental (d = -0.25; P < .001) and motor (d = -0.37; P < .001) development compared with very preterm/VLBW infants without infections. Mental development was most impaired by necrotizing enterocolitis (d = -0.40; P < .001) and meningitis (d = -0.37; P < .001). Motor development was most impaired by necrotizing enterocolitis (d = -0.66; P < .001). Chorioamnionitis did not affect mental (d = -0.05; P = .37) or motor (d = 0.19; P = .08) development. CONCLUSIONS AND RELEVANCE: Postnatal infections have detrimental effects on mental and motor development in very preterm/VLBW infants.
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