Table 4.

The butyric acid in IBS patient and HC

References	IBS patient			HC
	Mean (mmol/l)	SD	Number	Mean (mmol/l)	SD	Number
Kopecny and Simunek [27]	9.93	23.92	16	9.16	4.94	5
Mortensen et al. [8]	10.00	1.67	18	12.00	3.00	9
Ringel-Kulka et al. [26]	15.80	12.10	114	15.40	8.90	33
Vernia et al. [25]	18.60	15.10	38	13.00	8.50	50

IBS, irritable bowel syndrome; HC, healthy control