Abstract
INTRODUCTION: Abdominal bloating is a difficult symptom to treat. Hypnotherapy and diaphragmatic intervention have separately shown benefit on bloating in prior work but have not been united into a single intervention. We aimed to obtain data on the potential therapeutic impact of a novel audio-recorded bloating treatment for bloating integrating hypnosis and diaphragmatic breathing, with proposed synergistic effect. METHODS: Patients with nonorganic bowel disorders with predominant bloating symptoms completed a digitally delivered 7-session audio-recorded hypnotherapy program without clinician involvement. The intervention combined bloating-targeted hypnotic suggestions and guided diaphragmatic breathing delivered under hypnosis, and was supplemented with interval self-guided breathing exercises. Participants completed online REDCap assessments at baseline, midtreatment, at end of treatment, and 3-month follow-up, evaluating symptom severity, gastrointestinal symptom-specific anxiety, overall anxiety/depression, and quality of life. Outcomes were assessed in an intention-to-treat manner with repeated measures analysis of variances (ANOVAs) with Bonferroni-adjusted pairwise post hoc tests. RESULTS: Of 23 patients who started treatment, 22 (95.6%) completed follow-up. Bloating severity on Irritable Bowel Syndrome-Symptom Severity Scale and Patient Assessment of Upper Gastrointestinal Symptom Severity Index showed reduction in bloating with large effect sizes (Cohen d of ∼0.8) at the end of treatment, as did Visceral Sensitivity Index bloating-related anxiety. At the end of treatment, 16 patients (69.6%) were Irritable Bowel Syndrome-Symptom Severity Scale treatment responders (≥30% symptom reduction) on bloating and 17 (73.9%) on overall bowel symptom severity. Anxiety, depression, and quality-of-life scores were unchanged. Outcome measures were fully maintained at the 3-month follow-up. DISCUSSION: Results suggest the therapeutic utility of a new cost-effective self-administered bloating intervention. A randomized controlled trial is planned to confirm these therapeutic effects.