Table 4.

Receiver operating characteristic curves

Variables	Area under the curve	95%CI	P value	Sensitivity	Specificity
Mean bowel sound rate	0.8815	0.7906–0.9725	< 0.0001b	0.902	0.821
Cit level	0.6488	0.5223–0.7754	0.0313a	0.419	0.867
Mean bowel sound rate combined with Cit level	0.8956	0.8171–0.9741	< 0.0001b	0.872	0.857

^a P < 0.05.

^b P < 0.01.

Cit: Citrulline.