Table 11.

Colorectal cancer diagnosis results by TP53 and KRAS mutations in preoperative stools, n (%)

Gene	TP	FP	FN	TN	Sensitivity	Specificity	PPV	NPV
TP53	16	0	11	20	59.26	100.00	100.00	64.52
KRAS	10	0	17	20	37.04	100.00	100.00	54.05
TP53 or KRAS	18	0	9	20	66.67	100.00	100.00	68.97

TP: True positive; FP: False positive; FN: False negative; TN: True negative; PPV: Positive predictive value; NPV: Negative predictive value.