Phone-delivered PSST was feasible and acceptable. Efficacy estimates were similar to those of lengthier interventions conducted in other chronic illness populations. Older adolescents benefited more from the intervention than their younger counterparts.

Greater attention to the role of pain catastrophizing in contributing to functional disability in youth with IBD may be important given that pain-related cognitions are modifiable via intervention.

Patients diagnosed with IBD at a young age may need extra education and self-management strategies, as they were less likely to exhibit behaviours indicative of a successful transition to adult care. Additionally, transition programme development may benefit from the post-transition perspective across chronic illness populations.

AYA with IBD show deficits in responsibility for their disease management that have the potential to affect their self-management skills. Findings suggest provider communication is particularly important in promoting transition readiness. Additionally, it may be beneficial to wait to transition patients until they are older to allow them more time to master skills necessary to responsibly manage their own healthcare.