Table 3.

The propionic acid in IBS patient and HC

References	IBS patient			HC
	Mean (mmol/l)	SD	Number	Mean (mmol/l)	SD	Number
Kopecny and Simunek [27]	18.06	45.00	16	26.08	13.53	5
Mortensen et al. [8]	18.11	2.05	18	21.00	5.00	9
Ringel-Kulka et al. [26]	18.20	9.80	114	20.00	8.00	33
Tana et al. [25]	20.50	9.20	26	15.30	6.60	26
Vernia et al. [28]	23.70	13.10	38	17.10	8.00	50

IBS, irritable bowel syndrome; HC, healthy control