Table 5.

Total scores on the Zung Self-Rating Anxiety Scale (SAS) in irritable bowel syndrome (IBS) patients within groups and between groups at the end of the study (Mann–Whitney U test was used for testing each two groups. There were no significant differences between each two groups).

Group A									Group B			Group C			p-value†
Low-gluten (n = 7)			Mid-gluten (n = 9)			High-gluten (n = 9)			GFD (n = 15)			Unrestricted (n = 10)
Baseline	End	p-value*	Baseline	End	p-value*	Baseline	End	p-value*	Baseline	End	p-value*	Baseline	End	p-value*
36 ± 3.2	33.7 ± 3.6	0.03	39.6 ± 3.3	35.2 ± 2.1	0.02	36.7 ± 4.8	35.7 ± 5.3	0.11	38.6 ± 4.8	32.7 ± 3.6	0.005	35.9 ± 3.7	33.6 ± 3.6	0.06	0.29

*p-value for comparison within each group using the Wilcoxon-signed rank test.

^†p-value for between-groups comparison using the Kruskal–Wallis test.