[Hypnotherapy and cognitive-behavioral therapy for depression - Results from the three and a half year follow-up of a randomized controlled non-inferiority study].

Abstract

Objective: The scientific approval of hypnotherapy for certain mental disorders is still not confirmed. In a randomized-controlled study comparing the efficacy of hypnotherapy (HT) with cognitive behavioral therapy (CBT) for mild to moderate depressive episodes, a non-inferiority of HT compared to CBT could be found. The aim of this study was to examine depressive symptomatology in the long-term course three and a half years after end of the treatment.

Methods: A total of 152 randomized patients received outpatient individual psychotherapy with 16 to 20 sessions over a period of six months. All were invited to participate in a follow-up three and a half years after the end of treatment where depressive symptoms were assessed via self- and clinician-ratings. In the per-protocol (PP) analysis, only those with available data were included, but a comparison of characteristics was made with individuals without participation in the follow-up survey. An additional intention-to-treat (ITT) analysis was conducted with multiple imputed data for missing data.

Results: A total of 71 subjects (46.7%) participated in the follow-up. The noninferiority in the percentage symptom reduction assessed with the clinician-rating of HT compared with CBT was confirmed in the PP and the ITT sample. The symptom improvement in self- and clinician-rating by the end of therapy persisted during the follow-up. Response rates and remission rates for both self- and clinician-ratings are reported.

Conclusion: In this study, indications were found that HT was noninferior to CBT in the treatment of depression, even in the long term. Further studies should examine the efficacy of HT in larger multicenter samples and identify predictors of individual treatment success.