Community‐based specialist behaviour therapy
Study	Behavioural problems	Notes
Hassiotis 2009	ABC irritability Mean difference: ‐0.21, 95% CI ‐0.50 to 0.08 ABC lethargy Mean difference: ‐0.56, 95% CI ‐0.97 to 0.15 ABC stereotypy Mean difference: 0.06, 95% CI ‐0.33 to 0.45 ABC hyperactivity Mean difference: ‐0.56, 95% CI ‐0.97 to 0.15 ABC inappropriate speech Mean difference: ‐0.21, 95% CI ‐0.50 to 0.08 ABC – Total score 3 months Mean difference: ‐0.89, 95% CI ‐1.74 to ‐0.04 24 months Mean difference: ‐0.88, 95% CI ‐1.66 to ‐0.11	Mean difference between groups for pre‐ and post‐intervention scores (standard treatment and behaviour treatment plus standard treatment) Difference in mean transformed scores; transformed scores are the square root of raw scores. Scores are adjusted for each baseline ABC subscale score and retrospective time period (3‐, 6‐, and 24m).