Are group-based parenting programmes in Sweden a cost-effective way of reducing early child behaviour problems?

Materials and methods A cost-effectiveness analysis of four programmes, Komet, Connect, the Incredible Years, Cope, and a selfguided book on parenting strategies compared to a waitlist control, was conducted at 4-months post-test, from a payer’s perspective, based on a RCT. The study samples consisted of 961 parents of 3-12 year-old children with conduct problems, including 862 who started a programme or reading a self-guided book, and 159 in the waitlist control. Conduct problems were measured by the Eyberg child behaviour inventory (ECBI). The outcome measures were the incremental cost per one point reduction in the ECBI intensity scale, and incremental cost per one averted clinical case of conduct problems.