Table 3.

Correlation coefficients (Pearson) between GSRS, QOLRAD and SF-36 domains, HAD and physician-assessed frequency and severity of symptoms.

Instruments	GSRS Reflux	GSRS Abdominal Pain	GSRS Indigestion	GSRS Diarrhoea	GSRS Constipation	QOLRAD Emotional Distress	QOLRAD Sleep Disturbance	QOLRAD Food/drink problems	QOLRAD Physical/ Social Functioning	QOLRAD Vitality
SF-36 Bodily pain	-0.36	-0.51	-0.37	-0.19	-0.22	0.48	0.49	0.50	0.49	0.49
SF-36 General Health	-0.09	-0.34	-0.20	-0.24	-0.26	0.39	0.45	0.37	0.47	0.44
SF-36 Mental Heath	-0.17	-0.36	-0.35	-0.25	-0.36	0.63	0.48	0.51	0.61	0.60
SF-36 Physical functioning	-0.29	-0.34	-0.33	-0.19	-0.38	0.51	0.52	0.40	0.59	0.48
SF-36 Role – Emotional	-0.21	-0.34	-0.33	-0.24	-0.40	0.52	0.36	0.39	0.47	0.52
SF-36 Role – Physical	-0.24	-0.44	-0.36	-0.25	-0.44	0.50	0.43	0.48	0.58	0.54
SF-36 Social Functioning	-0.30	-0.41	-0.29	-0.20	-0.38	0.70	0.55	0.54	0.71	0.64
SF-36 Vitality	-0.38	-0.44	-0.30	-0.28	-0.37	0.60	0.53	0.59	0.65	0.69
SF-36 PCS*	-0.30	-0.44	-0.32	-0.20	-0.33	0.43	0.52	0.44	0.56	0.46
SF-36 MCS**	-0.22	-0.35	-0.31	-0.25	-0.37	0.63	0.44	0.49	0.58	0.61
QOLRAD Emotional Distress	-0.43	-0.45	-0.39	-0.19	-0.28
QOLRAD Food/drink problems	-0.53	-0.54	-0.44	-0.25	-0.34
QOLRAD Physical/social functioning	-0.43	-0.44	-0.40	-0.23	-0.36
QOLRAD Sleep disturbance	-0.51	-0.48	-0.41	-0.34	-0.30
QOLRAD Vitality	-0.54	-0.53	-0.46	-0.35	-0.31
HAD Anxiety score	0.13	0.36	0.36	0.32	0.34	-0.51	-0.37	-0.44	-0.48	-0.49
HAD Depression score	0.09	0.26	0.27	0.32	0.30	-0.48	-0.39	-0.38	-0.53	-0.48
Physician-assessed symptoms
Frequency of heart burn symptoms	0.36	0.28	0.13	-0.07	0.05	-0.44	-0.32	-0.40	-0.36	-0.37
Severity of heart burn symptoms	0.23	0.13	0.08	-0.15	0.29	-0.28	-0.20	-0.24	-0.30	-0.28

* Physical Component Summary score ** Mental Component Summary score Notes: Bolded coefficients are significant p < 0.0003