| AUC | area-under-the-curve |
| DGBI | Disorders of gut–brain interaction |
| FD | Functional dyspepsia |
| FGID | Functional gastrointestinal disorders |
| GI | Gastrointestinal |
| GSRS | Gastrointestinal Symptom Rating Scale |
| HADS | Hospital Anxiety and Depression Scale |
| IBS | Irritable bowel syndrome |
| IPAQ | International Physical Activity Questionnaire |
| PHQ-15 | Patient Health Questionnaire-15 |
| OQ45.2 | Outcome Questionnaire 45.2 |
| STAI-S/T | State-Trait Anxiety Inventory, -S: State, -T: Trait |
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