Cognitive behaviour therapy (CBT) v clinical management (CM) in recurrent major depression after successful treatment with antidepressant drugs*
| Outcome at 6 years | CBT | CM | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| *Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | ||||
| Patients who had ⩾1 relapse | 40% | 90% | 56% (28 to 76) | 2 (2 to 5) |