Assessing telephone-delivered cognitive-behavioural therapy (CBT) and web-delivered CBT versus treatment as usual in irritable bowel syndrome (ACTIB): a multicentre randomised trial.

Objective: To evaluate the clinical effectiveness of two modes of cognitive-behavioural therapy (CBT) for IBS compared with treatment as usual (TAU) in refractory IBS.

Design: A three-arm randomised controlled trial assessing telephone-delivered CBT (TCBT), web-based CBT (WCBT) with minimal therapist support, and TAU. Blinding participants and therapists was not possible.