Table 6. Folic acid and homocysteine concentration in cases and controls.

Biochemicalparameter	Statistical parameter	Cases	Control
Folic Acid (µg/L)	Mean (M)	12.05	11.97
	Standard Deviation (SD)	4.01	3.69
	Variance	3.91	3.58
	t/df/p-value	+0.07/37/0.95
Homocysteine (µmol/L)	Mean (M)	9.30	15.23
	Standard Deviation (SD)	2.03	5.14
	Variance	1.98	4.99
	t/df/p-value	−4.87/37/<0.0001