Cost-effectiveness of structured group psychoeducation versus unstructured group support for bipolar disorder: Results from a multi-centre pragmatic randomised controlled trial

•The cost-effectiveness of group psychoeducation (PEd) to treat BD is unknown.•Data were collected as part of a pragmatic randomised controlled trial (RCT).•The control treatment in the RCT was group peer support (PS).•PEd may be cost-effective but this is uncertain.•Further economic data may help to address this uncertainty.