Table 4. Stepwise regression summary for global DNA methylation in all studied mothers.

All mothers (Cases and controls) (N = 184)
Dependent variable	Predictor variable	β	Multiple R2 change	P
Global DNA methylation	Affiliation to a group cases/controls	0.256	0.102	0.000
	MTHFR C677T genotype/diet	0.207	0.032	0.011
	Age group	-0.164	0.026	0.018

Criteria used for independent variable’s entry or removal: F to enter = 4, F to remove = 1.