A dietitian-led low-FODMAP diet webinar: a pre-post study evaluating its impact on symptoms of irritable bowel...

Evidence suggests that the low fermentable oligo-, di-, mono-saccharides, and polyols (FODMAP) diet improves irritable bowel syndrome (IBS) symptoms when delivered by a dietitian. However, demand for dietetic appointments exceeds supply. Prerecorded webinars are acceptable and cost-effective for delivering first-line IBS dietary advice.

This study, using a pre-post design, aimed to evaluate the effectiveness of a low-FODMAP diet restriction phase webinar at improving IBS symptoms. Participants with self-reported IBS symptoms were asked to report their IBS symptoms, stool frequency, stool consistency and IBS medication use, before and 8 weeks postwebinar via an online questionnaire. The presence and severity of participants' symptoms and bowel habits were captured using validated tools and a global symptom question.

In total 228 participants responded to both pre- and postsurveys. A statistically significant improvement in all symptoms was observed 8 weeks postwebinar (p < 0.05). The proportion of participants rating their overall symptoms as moderate-to-severe reduced from 85.5% at baseline to 34.6% postwebinar (50.9% reduction [p < 0.001]). The proportion of participants reporting normal stool consistency and frequency significantly increased postwebinar (23.2%-39.9% [p < 0.001] and 76.3%-89% [p < 0.001], respectively). Satisfactory relief of symptoms increased from 16.7% to 53.1%, (p < 0.001) 8 weeks postwebinar.

These results are comparable with literature on the efficacy of face-to-face delivery of low-FODMAP diet education. Dietitians should consider directing triaged patients with IBS, who have tried first-line dietary advice, to this webinar as an alternative or alongside current practice.