Table 2

Distribution of caloric-adjusted (/1000kcal) dietary intake of folate from different sources by case/control status

VariablesCases (n = 470)Controls (n = 472)Pa
Means ± SD (median, range)Means ± SD (median, range)
Food folate (μg/day)127.5 ± 42.3 (120.1, 49.3–344.6)137.8 ± 45.4 (130.4, 58.3–289.3)<0.001
Fortified folic acid (μg/day)42.7 ± 44.8 (38.5, 0–340.8)40.7 ± 40.9 (38.3, 0–270.9)0.478
Supplemental folic acid (μg/day)126.8 ± 251.3 (109.5, 0–3673.8)104.3 ± 122.3 (104.9, 0–1364.5)0.080
Total folate (μg/day)297.1 ± 267.8 (270.1, 49.3–3865.6)282.8 ± 140.9 (268.9, 65.9–1579.6)0.305
  • a Two-sided t test or Wilcoxon’s scores test (for fortification folate, supplement folate, and total tolate).