Table 3 Criterion validity (Pearson's correlation test) between the Visual Analogue Scale for Irritable Bowel Syndrome (VAS-IBS) and the Gastrointestinal Symptom Rating Scale (GSRS) as well as the Psychological General Well Being Index (PGWB) (n = 71).
VAS-IBS | GSRS- Pain | GSRS- Diarrhoea | GSRS- Constipation | GSRS- Indigestion | GSRS- item Vomiting/nausea | PGWB |
|---|---|---|---|---|---|---|
Physical symptom | Â | Â | Â | Â | Â | Â |
   Abdominal Pain | -0.597 |  |  |  |  |  |
   Diarrhoea |  | -0.806 |  |  |  |  |
   Constipation |  |  | -0.770 |  |  |  |
   Bloating and Flatulence |  |  |  | -0.664 |  |  |
   Vomiting and Nausea |  |  |  |  | -0.814 |  |
Mental health | Â | Â | Â | Â | Â | Â |
   Perception of mental well-being |  |  |  |  |  | 0.689 |