Table 5.

Head-to-head comparison of the sensitivity for colorectal cancer of faecal pyruvate kinase isoenzyme type M2 and guaiac-based faecal occult blood test n (%)

Reference	CRC M2-PK	CRC gFOBT
Naumann et al[45], 2004	27 (85.2)	27 (62.9)
Vogel et al[44], 2005	22 (77)	22 (27)
Shastri et al[7], 2006	74 (81.1)	74 (36.5)
Koss et al[8], 2008	32 (81)	32 (21)
Sum	155	155
mean ± SD	81.1 ± 3.3	36.9 ± 18.5

n: Number of samples tested; %: Sensitivity; CRC: Colorectal cancer; gFOBT: Guaiac-based faecal occult blood test; M2-PK: Pyruvate kinase isoenzyme type M2.