Authors' objectives:

The aim of this document is to determine whether cognitive behavioural therapy (CBT) in addition to antispasmodic treatment offers a cost-effective benefit to primary care patients with irritable bowel syndrome (IBS) and to identify predictors of outcome.

Authors' results and conclusions: The addition of CBT produced a significant benefit compared with the mebeverine-only group at 3 months after treatment on all outcome measures, except for the adherence to medication scales. The difference between the groups was 107.8 points on the SSS, 24.5 points on question 4 of the SSS and 6.3 points on the WASA, representing therapeutic gains of approximately 20%, 28% and 40%, respectively. However, there was also evidence that these improvements began to wane, so that at 6 and 12 months follow-up significant therapeutic benefit of the addition of CBT could only be detected on question 4 of the SSS and on the WASA. The behaviour scale for IBS detected significant, positive changes in coping behaviours at up to 6 months after treatment. Three factors predicting a poor outcome were identified: male gender, believing that IBS had serious consequences and belief in an external aetiology, all of which were associated with greater than average disability at follow-up. The addition of CBT to mebeverine did not reduce overall treatment or social costs. The nested study on testing for coeliac disease provides cautious support for the inclusion of antiendomysial and antigliadin antibody testing in the investigation of patients thought to have IBS.

Authors' recommendations: Specially trained practice nurses can provide effective CBT to primary care patients with a clinical diagnosis of IBS, which although effective does not reduce service or social costs. Using a variety of measures the beneficial therapeutic effects of the addition of CBT to antispasmodic therapy persist for up to 6 months. Future research might include studies of the long-term follow-up of IBS patients treated with CBT, cost;benefit analyses comparing CBT with other therapeutic approaches to IBS, and evaluating means of training both non-specialist health professionals and GPs to deliver CBT.

Authors' methods: Randomised controlled trial

Project Status: Completed

URL for project: http://www.hta.ac.uk/1091

Year Published: 2006

English language abstract: An English language summary is available

Publication Type: Not Assigned

Country: England, United Kingdom

Organisation Name: NIHR Health Technology Assessment programme

Contact Address: NIHR Journals Library, National Institute for Health and Care Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK

Contact Name: journals.library@nihr.ac.uk

Contact Email: journals.library@nihr.ac.uk

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