Abstract
Objective
To determine the effectiveness of policy-driven therapy (ie, Part C early intervention
[EI]) in the context of varying maternal supports among preterm infants in Wisconsin.
Methods
A longitudinal study of mother−infant dyads recruited from 3 newborn intensive care
units in southeastern Wisconsin. Participation in EI-based therapy was collected at
36 months via parent-report. Cognitive function was measured at 16 months by use of
the Bayley Scales of Infant Development (Mental Developmental Index), 2nd edition
and at 24 and 36 months postterm via use of the Stanford-Binet Intelligence scale,
5th edition. Maternal support was measured at 4 months with the Maternal Support Scale.
Propensity score matching was used to reduce selection bias. Latent growth models
of matched pairs estimated the effect of EI therapy on cognitive function trajectories.
Ordinary least squares regression estimated the differential effect of EI therapy
on cognitive function at 16, 24, and 36 months postterm for mothers reporting more
maternal supports.
Results
Of the 128 infants, 41 received EI therapy and, of those, 32 (78%) were successfully
matched with controls. The results of the matched analysis (n = 64) reveal that 1)
receipt of therapy is inversely associated with cognitive function baseline (P = .04) and positively associated with trajectories (P = .03), 2) the number of maternal supports is positively associated with cognitive
function for families receiving Part C early intervention, at 16 months (P = .05), 24 months (P < .01), and 36 months (P = .05) postterm.
Conclusions
Participation in EI therapy may be associated with more optimal cognitive function
trajectories. Among preterm children whose mothers have more supports, receiving therapy
appears particularly beneficial.
Keywords
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Article Info
Publication History
Published online: January 09, 2012
Accepted:
November 22,
2011
Received:
July 18,
2011
Identification
Copyright
© 2012 Academic Pediatric Association. Published by Elsevier Inc. All rights reserved.
