Head growth trajectory and neurodevelopmental outcomes in preterm neonates

Abstract

OBJECTIVES: To evaluate the association between head growth (HG) during neonatal and postdischarge periods and neurodevelopmental outcomes of preterm neonates of <29 weeks gestational age. METHODS: We conducted a retrospective cohort study of infants <29 weeks gestational age admitted between 2009 and 2011 to participating Canadian Neonatal Network units and followed by Canadian Neonatal Follow-Up Network clinics. Differences in head circumference (ΔHC) z score were calculated for 3 time periods, which include admission to discharge, discharge to follow-up at 16-36 months, and admission to follow-up. These were categorized in 1 reference group (ΔHC z score between -1 and +1) and 4 study groups (ΔHC z score of +2). Neurodevelopmental outcomes were compared with the reference group. RESULTS: 1973 infants met the inclusion criteria. Poor HG occurred frequently during the NICU admission (ΔHC z score