Table 1.

Diagnosis of colorectal cancer by fecal volatile organic compounds detection

Ref.	Year	Category	Disease (:control)	AUC	Accuracy	Sensitivity	Specificity	Sample No.	Control No.
de Meij et al[41]	2014	Colorectal cancer	Advanced adenomas	0.79	-	62%	86%	60	57
de Meij et al[41]	2014	Colorectal cancer	Colorectal cancer	0.92	-	85%	87%	40	57
de Meij et al[41]	2014	Colorectal cancer	Colorectal cancer: Advanced Adenomas	0.92	-	75%	73%	40	57
de Meij et al[41]	2014	Colorectal cancer	Advanced adenomas + colorectal cancer	0.92	-	85%	68%	40	57
Colorectal cancer pooled mean:				0.89	-	77%	79%	-	-

If no control is specified, the comparison is against a healthy control.