. Author manuscript; available in PMC: 2009 Sep 21.

Published in final edited form as: Ethn Dis. 2008 Spring;18(2 Suppl 2):S2–168-71.

Table 4.

Knowledge about folic acid role in preventing birth defects by social strata

Characteristics	Knowledge
Class I – Professional	100%
Class II – Minor professional	95%
Class III – Skilled workers	92%
Class IV – Semiskilled workers	89%
Class V – Unskilled workers	84%