Results from a psychometric validation study: irritable bowel syndrome patients report higher symptom burden using end-of-day versus real-time assessment.

Psychometric evaluation demonstrated strong validity and reliability of the ESM-PROM for real-time GI symptom assessment in IBS. In addition, the ESM-PROM provides a precise and reliable ascertainment of individual symptom pattern and trigger interactions, without the bias of peak reporting when compared to retrospective methods. This highlights its potential as a valuable tool for personalized healthcare in monitoring disease course and treatment response in IBS patients.