Table 1.

The level of serum kynurenine pathway metabolites in IBS-D and healthy control groups (x±s, n=30).

Groups	Control	IBS-D	t-value	P-value
Trp	5765.196±1254.989	5756.037±865.281	0.013	0.990
KYN	213.561±46.563	294.406±53.812	-2.437	0.021
KYNA	13.383±2.490	9.812±1.665	2.556	0.016
QUIN	72.207±11.379	96.579±20.981	-2.190	0.037
KYN/Trp	0.038±0.004	0.053±0.008	-3.446	0.002
QUIN/KYNA	5.836±1.312	11.121±3.293	-3.198	0.005
QUIN/KYN	0.386±0.102	0.328±0.045	1.129	0.268
KYNA/KYN	0.070±0.018	0.038±0.011	3.242	0.003