Discussion
disability, pain
The I-WOTCH main trial results showed that 62/225 (29%) of participants in the intervention group stopped taking opioids, compared with 15/208 (7%) in the usual-care group at 12 month follow-up without any difference in pain, or pain related disability, between the study arms. The process evaluation data indicate that the intervention was delivered as intended with good fidelity scores. There was evidence of participants attributing their opioid reduction to the I-WOTCH study. Participants and staff alike felt the package as whole was acceptable and deliverable. However, poor attendance was an issue with 90 participants randomised to the intervention not attending any group.