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 | ||||||
| Abdominal Pain | -0.597 | |||||
| Diarrhoea | -0.806 | |||||
| Constipation | -0.770 | |||||
| Bloating and Flatulence | -0.664 | |||||
| Vomiting and Nausea | -0.814 | |||||
| Mental health | ||||||
| Perception of mental well-being | 0.689 |
Values are given as correlation coefficients and are all statistically significant, p < 0.0001.