# The efficacy of hypnotherapy in the treatment of post-traumatic stress disorder: a meta-analysis of pre–post studies - URL: https://alisanburak.com/en/wcp-2026-posterler/ev0108 - Language: en - Last updated: not specified - Page title: The efficacy of hypnotherapy in the treatment of post-traumatic stress disorder: a meta-analysis of pre–post studies | WCP 2026 Summary > In a meta-analysis of seven pre–post studies, hypnotherapy produced a large improvement in post-traumatic stress disorder symptoms, with a pooled standardized… This page was translated automatically from Turkish. [Read the original](https://alisanburak.com/wcp-2026-posterler/ev0108) This page is an AI-assisted Turkish summary of the study presented at the 26th World Congress of Psychiatry. The study belongs to the presenting authors; please refer to the original source when citing it. EV0108 E-PosterTrauma and StressMeta-analysis # The efficacy of hypnotherapy in the treatment of post-traumatic stress disorder: a meta-analysis of pre–post studies EFFECTIVENESS OF HYPNOTHERAPY IN TREATING POST-TRAUMATIC STRESS DISORDER: A META-ANALYSIS OF PRE-POST STUDIES Presenter: Nicolas Aguirre-Verduga Country: Ecuador In a meta-analysis of seven pre–post studies, hypnotherapy produced a large improvement in post-traumatic stress disorder symptoms, with a pooled standardized mean difference of 1.26. The aim of the study was to synthesize the available pre–post clinical evidence on the efficacy of hypnotherapy in reducing the severity of post-traumatic stress disorder (PTSD) symptoms. A systematic search was conducted in PubMed, PsycINFO, and Scopus, and controlled and uncontrolled pre–post designs in which hypnotherapy was used as the primary treatment for patients with a formal PTSD diagnosis were included. Cohen’s d and Hedges’ g were calculated for symptom change and pooled using a random-effects model. Heterogeneity was assessed using I², and sensitivity analyses and subgroup analyses explored intervention duration, follow-up effects, and comorbidities. A total of seven pre–post studies were included. The pooled standardized mean difference in the random-effects model was 1.26 (95% confidence interval 0.71 to 1.82), and the test for overall effect was reported as Z = 4.44 (p < 0.00001). Heterogeneity was moderate (I² = 54%, p = 0.04; τ² = 0.23; χ² = 13.07, df = 6) and was attributed to differences in methods and intervention protocols; individual study effect sizes ranged from 0.65 (95% CI 0.00 to 1.30) to 6.79 (95% CI 1.63 to 11.96). The authors state that hypnotherapy is a promising intervention that demonstrates clinically meaningful symptom improvement in PTSD, but note that most studies were small and lacked a control group, and that larger randomized trials using standardized protocols are needed. [View the original poster](https://cslide.ctimeetingtech.com/wcp26/attendee/eposter/file/506) How to cite this study APA 7: Aguirre-Verduga, N., Leal-Samaniego, D., Cueva-Espinoza, W., & Manzur-Polit, S. (2026, September 23-26). Effectiveness of hypnotherapy in treating post-traumatic stress disorder: a meta-analysis of pre-post studies [E-poster]. 26th WPA World Congress of Psychiatry (WCP 2026), Stockholm, Sweden. https://cslide.ctimeetingtech.com/wcp26/attendee/eposter/file/506 Vancouver: Aguirre-Verduga N, Leal-Samaniego D, Cueva-Espinoza W, Manzur-Polit S. Effectiveness of hypnotherapy in treating post-traumatic stress disorder: a meta-analysis of pre-post studies [e-poster]. 26th WPA World Congress of Psychiatry (WCP 2026); 2026 Sep 23-26; Stockholm, Sweden. 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