Table 6.

Irritable bowel syndrome symptom severity scale scores before and after treatment

	After treatment	Before treatment, n (%)			Kappa	P value
		Mild	Moderate	Severe
All patients	Asymptomatic	3 (50.0)	2 (6.5)	4 (8.3)	0.021	0.648
	Mild	3 (50.0)	22 (71.0)	17 (35.4)
	Moderate	0 (0)	6 (19.4)	17 (35.4)
	Severe	0 (0)	1 (3.2)	10 (20.8)
Group 1	Asymptomatic	2 (66.7)	1 (6.7)	2 (8.0)	0.013	0.840
	Mild	1 (33.3)	11 (73.3)	9 (36.0)
	Moderate	0 (0)	3 (20.0)	9 (36.0)
	Severe	0 (0)	0 (0)	5 (20.0)
Group 2	Asymptomatic	1 (33.3)	1 (6.2)	2 (8.7)	0.031	0.649
	Mild	2 (66.7)	11 (68.8)	8 (34.8)
	Moderate	0 (0)	3 (18.8)	8 (34.8)
	Severe	0 (0)	1 (6.2)	5 (21.7)

Group 1: Low fermentable oligo, di- and monosaccharides and polyols (FODMAP) diet + probiotic, Group 2: low fermentable oligo, di- and monosaccharides and polyols diet + placebo.