Folic Acid n=83 Placebo n=81 Total n=164
Compliance n (%)
0% 6 (7) 7 (8) 13 (8)
33% 11 (13) 12 (15) 23 (14)
67% 11 (13) 12 (15) 23 (14)
100% 55 (67) 50 (62) 105 (64)