Some health experts recommend that women take 400 micrograms of the
B vitamin folic acid, for which one of the following reasons:

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Limit
Upper 95% Confidence
Limit
To make strong bones 142 18.9 1.8 15.3 22.5
To prevent birth defects 600 57.7 2.2 53.4 62.0
To prevent high blood pressure 42 6.7 1.3 4.2 9.3
Some other reason 131 16.7 1.8 13.2 20.2

Among respondents 18-44 years, excluding unknowns and refusals.
 
On Questionnaire Split A