Reliability and validity of the Gastrointestinal Symptom Rating Scale (GSRS) and Quality of Life in Reflux and Dyspepsia (QOLRAD) questionnaire in dyspepsia: A six-country study

Table 3 Test-retest reliability (intraclass correlation coefficient [ICC]) for Gastrointestinal Symptom Rating Scale (GSRS) and Quality of Life in Reflux and Dyspepsia questionnaire (QOLRAD) domains between visits 1 and 2.

Questionnaire and domain	Translation
	Afrikaans	German	Hungarian	Italian*	Polish	Spanish
GSRS	(N = 108)	(N = 132)	(N = 124)	(N = 165)	(N = 134)	(N = 154)
Reflux	0.37	0.66	0.59	N/A	0.61	0.48
Abdominal pain	0.55	0.36	0.57	N/A	0.45	0.62
Indigestion	0.46	0.61	0.75	N/A	0.71	0.75
Diarrhoea	0.56	0.67	0.70	N/A	0.63	0.38
Constipation	0.71	0.60	0.72	N/A	0.72	0.72
QOLRAD	(N = 108)	(N = 123)	(N = 124)	(N = 174)	(N = 134)	(N = 154)
Emotional distress	0.51	0.75	0.70	N/A	0.56	0.65
Food/drink problems	0.51	0.62	0.79	N/A	0.62	0.75
Physical/social functioning	0.53	0.73	0.74	N/A	0.68	0.69
Sleep disturbance	0.62	0.73	0.82	N/A	0.61	0.66
Vitality	0.46	0.71	0.74	N/A	0.41	0.66

*In the Italian translation, test-retest reliability was not analyzed because the patients were not in a stable phase between visit 1 and 2.

ISSN: 1477-7525