Table 2. MTHFR C677T allele and genotype frequencies in male and female of schizophrenia and healthy controls.

Variable	SCZ (n=957)	Controls (n=576)	F or χ2 (p)
C677T genotype			2.0(0.36)
CC (%)	298(38.9)	145(34.8)
CT (%)	344(45.0)	202(48.4)
TT (%)	123(16.1)	70(16.8)
Male (CC/CT/TT)			7.6(0.023)
CC (%)	101(15.8)	31(18.7)
CT (%)	280(43.7)	87(52.4)
TT (%)	260(40.5)	48(28.9)
Female (CC/CT/TT)			2.3(0.32)
CC (%)	22(17.7)	38(15.3)
CT (%)	64(51.6)	115(46.2)
TT (%)	38(30.6)	96(38.5)
C677T allele (C/T)	590/940	342/492	0.08(0.83)
Male (C/T)	482/800	149/183	5.9(0.015)
Female (C/T)	108/140	191/307	1.9(0.17)