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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).

From: Development and psychometric testing of the Visual Analogue Scale for Irritable Bowel Syndrome (VAS-IBS)

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
  1. Values are given as correlation coefficients and are all statistically significant, p < 0.0001.