Efficacy of Applied Behavioral Intervention in Preschool Children with Autism for Improving Cognitive, Language, and Adaptive Behavior: A Systematic Review and Meta-analysis
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Objective: To review the effectiveness of applied behavior intervention (ABI) programs for preschool children with autism spectrum disorder (ASD) in their cognitive, adaptive behavior, and language development. Study design: Systematic reviews, randomized or quasirandomized controlled trials (RCT) of ABI delivered to preschool children with ASD were reviewed. Quantitative data on cognitive, language, and behavior outcomes were extracted and pooled for meta-analysis (RevMan 4.2). Results: Thirteen studies met the inclusion criteria. Six of these were randomized comparison trials with adequate methodologic quality (PEDro = 6). Meta-analysis of 4 studies concluded that, compared with standard care, ABI programs did not significantly improve the cognitive outcomes of children in the experimental group who scored a standardized mean difference (SMD) of 0.38 (95%CI -0.09 to 0.84; P = .1). There was no additional benefit over standard care for expressive language; SMD of 0.37 (95%CI -0.09 to 0.84; P = .11), for receptive language; SMD of 0.29 (95%CI -0.17 to 0.74; P = .22) or adaptive behavior; SMD of 0.30 (95%CI -0.16 to 0.77; P = .20). Conclusions: Currently there is inadequate evidence that ABI has better outcomes than standard care for children with autism. Appropriately powered clinical trials with broader outcomes are required. © 2009 Mosby, Inc. All rights reserved.
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