Table 4. Folate, homocysteine and vitamin B12 values in CRC patients (mean and standard deviation).

	Folate (ng/ml)			Homocysteine (µmol/l)			Vitamin B12
	Total	4.6–18.7 ng/ml a	< 4.6 ng/mlb	Total	4.3–11.1 µmol/l a	> 11.1 µmol/lc	Total	191–663 pg/ml a	> 663 pg/mlc
N° of patients	36	23	13	37	22	15	39	35	4
Mean + SD	5.5 ± 1.7	6.5 ± 1.1	3.6 ± 0.6	10.8 ± 4.3	8.0 ± 1.9	14.3 ± 3.2	447 ± 152	414 ± 119	738 ± 226

^a Normal range, ^b below the normal range, ^c above the normal range.