. Author manuscript; available in PMC: 2014 Aug 14.

Published in final edited form as: Mol Nutr Food Res. 2013 Mar 4;57(4):637–644. doi: 10.1002/mnfr.201200108

Table 4.

Effect on RBC folate of different doses of folic acid (combining groups)

Effect	Difference Estimate^*	CI	p-value
200 vs. 0	24.6	−4.6, 78.3	0.18
400 vs. 200	96.8^a	67.5, 157.4	<.001
400 vs. 0	121.4 ^a	88.2, 210.5	<.001

Difference of the mean difference of both doses.

Significant at p<.01