Abstract
BackgroundThe Infant Behavioral Assessment and Intervention Program (IBAIP©) improved motor function at 24months, and mental and behavioural development in high risk subgroups of very low birth weight (VLBW) infants. AimTo determine IBAIP's effects on executive functioning, behaviour and cognition at preschool age. Study designFollow-up of a randomised controlled trial (RCT). SubjectsAt 44months corrected age, all 176 VLBW infants were invited for follow-up. Forty-one term born children were assessed for comparison. Outcome measuresVisual Attention Task (VAT), Gift delay, Peabody Picture Vocabulary Test III-NL (PPVT), Visual motor integration tests and Miller assessment for preschoolers. Parents completed Behavior Rating Inventory of Executive Function-Preschool (BRIEF-P) and Child Behavior Checklist (CBCL). ResultsAt preschool age, 76 (88%) children of the intervention group and 75 (83%) children of the control group participated. There were no significant differences between the intervention and the control group. However, positive interaction effects between intervention and infants with bronchopulmonary dysplasia, infants born at gestational age<28weeks, and infants of low educated mothers were found on CBCL, CBCL and BRIEF-P, and PPVT respectively. Most interaction effects exceeded 1 standard deviation in favour of the intervention children. The 151 VLBW children performed significantly worse than the term born children on the VAT, BRIEF-P and CBCL. ConclusionIBAIP effects in VLBW children did not sustain until preschool age on executive functioning, behaviour and cognition. However, the most vulnerable children had a clinical relevant profit from IBAIP. VLBW children performed worse than the term born children.This study is a follow-up at preschool age of the multi-centre RCT of IBAIP versus usual care in VLBW infants. The RCT was performed in Amsterdam, The Netherlands (IBAIP RCT registered on http://www.controlled-trials.com number ISRCTN65503576).
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