Table 1.

Intervention effect on knowledge and use of folate supplements among all subjects randomized^a

	Intervention n=227	Control n=219	p-value
	n (%)	n (%)
Knows that folate can prevent birth defects	105 (46)	59 (27)	<0.001
Knows that folate is most important in the very first weeks of pregnancy	81 (36)	37 (17)	<0.001
Knows that folate supplements should be taken daily	92 (41)	50 (23)	<0.001
Knows that folate supplements can be purchased without a prescription	99 (44)	54 (25)	<0.001
Took a folate supplement in the last few months	72 (32)	45 (21)	0.007

^aIn this analysis, women lost to follow-up were assumed to have no knowledge or use of folate.