Table 2. Performance characteristics of the tumour M2-PK stool test at a cutoff value of 4 U ml⁻¹ among patients with colorectal cancer.

		Sensitivity
Patient group	Proportion of CRC cases tested positive	(%)	95% confidence interval
CRC	44/65	68	55–79
Colon	22/26	85	65–96
Rectum	22/39	56	41–74
Proximala	14/16	88	62–99
Distala	30/49	61	46–75
T1b	4/6	67	22–96
T2b	7/16	44	20–70
T3b	24/34	71	53–85
T4b	4/4	100	40–100
Dukes' A	8/12	67	35–90
Dukes' B	11/18	61	36–83
Dukes' C	8/12	67	35–90
Dukes' D	6/6	100	54–100
Neoadjuvant therapy
No	33/48	69	54–81
Yes	11/16	69	41–89

Abbreviations: CRC=colorectal cancer.

^aProximal / distal to the splenic flexure.

^bT stage according to the TNM classification.