Table 2.

Cronbach's alpha at visit 1 and test-retest reliability (Intraclass Correlation Coefficient (ICC))for GSRS and QOLRAD domains between visits 1 and 2.

Domains	Cronbach's alpha	ICC
GSRS
Reflux	0.70	0.60
Abdominal pain	0.53	0.49
Indigestion	0.86	0.73
Diarrhoea	0.91	0.67
Constipation	0.75	0.72
QOLRAD
Emotional distress	0.94	0.84
Food/drink problems	0.91	0.76
Physical/social functioning	0.91	0.84
Sleep disturbance	0.92	0.75
Vitality	0.90	0.70