Parent education programmes for children's behaviour problems: medium to long term effectiveness

CRD COMMENTARY: A good review of the area. A thorough literature search was conducted which included attempts to locate unpublished literature. Inclusion criteria were clearly stated and validity was formally assessed. The authors should have provided further information on the number of reviewers involved in each stage of the review process such as assessing studies for inclusion, data extraction and quality assessment. Study details are clearly presented in summary tables and the narrative synthesis presented is appropriate in view of the heterogeneity of the studies evaluated. It would have been helpful if the reviewers had placed more emphasis on the results obtained from the randomised control trials as studies of this design are less likely to produce biased results. The authors conclusions follow from the results presented.