CRD summary: The authors concluded that early intensive behavioural intervention was associated with large to moderate improvements in IQ (intelligence quotient) and adaptive behaviour in children with autism compared to no intervention or eclectic treatment. Given the paucity of randomised controlled trials and the unclear quality of the included trials, the reliability of the authors’ conclusions is unclear.

Eldevik, S., Hastings, R.P., Hughes, J.C., Jahr, E., Eikeseth, S., Cross, S.

 

YOU CAN VIEW THE ENTIRE STUDY BY CLICKING ON THIS LINK: Meta-analysis of early intensive behavioral intervention for children with autism

Abstract: We gathered individual participant data from 16 group design studies on behavioral intervention for children with autism. In these studies, 309 children received behavioral intervention, 39 received comparison interventions, and 105 were in a control group. More children who underwent behavioral intervention achieved reliable change in IQ (29.8%) compared with 2.6% and 8.7% for comparison and control groups, respectively, and reliable change in adaptive behavior was achieved for 20.6% versus 5.7% and 5.1%, respectively. These results equated to a number needed to treat of 5 for IQ and 7 for adaptive behavior and absolute risk reduction of 23% and 16%, respectively. Within the behavioral intervention sample, IQ and adaptive behavior at intake predicted gains in adaptive behavior. Intensity of intervention predicted gains in both IQ and adaptive behavior.

Eldevik, S., Hastings, R.P., Hughes, J.C., Jahr, E., Eikeseth, S., Cross, S.

 

YOU CAN VIEW THE ENTIRE STUDY BY CLICKING ON THIS LINK: Using Participant Data to Extend the Evidence Base for Intensive Behavioral Intervention for Children With Autism 

Abstract: We evaluated outcomes for 31 children with autism (2–6 years of age at intake) who received behavioral intervention in mainstream pre-school settings and a comparison group of 12 children receiving treatment as usual. After 2 years, children receiving behavioral intervention had higher IQ scores (Hedges g = 1.03 (95% CI = .34, 1.72) and adaptive behavior composite scores (Hedgesg = .73 (95% CI = .05, 1.36). Despite probably fewer intervention hours, these group level outcomes were comparable to studies providing more intensive intervention. Individual child data also showed positive results with 19.4% achieving change at a reliable level for IQ; but a lower percentage than found in recent meta-analysis research. Strengths and weaknesses of the mainstream pre-school delivery model are discussed.

 

Eldevik, S., Hastings, R.P., Hughes, J.C., Jahr, E.

 

 

YOU CAN VIEW THE ENTIRE STUDY BY CLICKING ON THIS LINK: Outcomes of Behavioral Intervention for Children with Autism in Mainstream Pre-School Settings