Table 2.

Cronbach's alpha at visit 1.

	Translation
Questionnaire and domain	Afrikaans	German	Hungarian	Italian	Polish	Spanish
GSRS	(N = 108)	(N = 132)	(N = 124)	(N = 165)	(N = 134)	(N = 154)
Reflux	0.61	0.72	0.73	0.84	0.49	0.67
Abdominal pain	0.60	0.43	0.59	0.65	0.49	0.45
Indigestion	0.76	0.79	0.74	0.74	0.73	0.78
Diarrhoea	0.75	0.84	0.79	0.72	0.78	0.82
Constipation	0.82	0.81	0.79	0.76	0.87	0.75
QOLRAD	(N = 108)	(N = 123)	(N = 124)	(N = 174)	(N = 134)	(N = 154)
Emotional distress	0.91	0.94	0.94	0.93	0.92	0.95
Food/drink problems	0.83	0.90	0.90	0.88	0.86	0.91
Physical/social functioning	0.84	0.90	0.89	0.89	0.86	0.91
Sleep disturbance	0.88	0.89	0.94	0.89	0.91	0.93
Vitality	0.79	0.90	0.87	0.80	0.87	0.89

GSRS, Gastrointestinal Symptom Rating Scale; QOLRAD, Quality of Life in Reflux and Dyspepsia questionnaire.