Table 5.

Percentage^a levels of 5,10-methyleneTHF and THF by the 5′-TSER 28 bp polymorphism.

5′-TSER 28 BP		5,10-METHYLENETHF (% ± SD)		THF (% ± SD)
GENOTYPE	N	TUMOR	MUCOSA	TUMOR	MUCOSA
2R/2R	11	38.5 ± 7.8	32.5 ± 13.0	45.2 ± 10.3	47.1 ± 12.9
2R/3R	26	41.2 ± 13.9	34.8 ± 12.8	41.9 ± 12.5	44.8 ± 12.7
3R/3R	16	28.0 ± 12.1	34.1 ± 11.6	46.5 ± 14.2	39.3 ± 10.1
P-valueb		0.0031	0.60	0.64	0.25

Notes:

^aIn relation to the total folate concentration.

^bP by Kruskal—Wallis tests.