Nine RCTs, with 751 participants (range 24 to 171), were included in the review. Methodological quality scores ranged from 4 to 8; all but two of the included trials met the authors' definition of high quality (scored higher than 5).
Sensory stimulation occupational therapy was associated with a statistically significant improvement in behavioural problems compared with usual care (SMD 0.32, 95% CI 0.04 to 0.59; four RCTs); this was classified as a small effect.
Environmental modification occupational therapies had no significant effect on behavioural problems (two RCTs).
Functional task activity occupational therapies had no significant effect on depression (three RCTs).
No trials were identified that assessed the remaining combinations of occupational therapy classification and outcome type (behavioural problems or depression).
There was no evidence of statistical heterogeneity or publication bias for any of the analyses reported.