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Table 3 Blood level of vitamins and metabolites

From: High levels of circulating folate concentrations are associated with DNA methylation of tumor suppressor and repair genes p16, MLH1, and MGMT in elderly Chileans

  Men
(n = 66)
Women
(n = 142)
Total
(n = 208)
Vitamin B12 (pmol/L) Median
(p25–p75)
370.7
(221.9–683.0)
438.5
(215.4–767.5)
409.3
(218.8–729.3)
<148 pmol/L % (n)
(95% CI)
10.6(7)
(4.4–20.6)
11.3(16)
(6.6–17.7)
11.1(23)
(7.1–16.1)
148–221 pmol/L % (n)
(95% CI)
12.1(8)
(5.4–22.5)
9.9(14)
(5.5–16)
10.6(22)
(6.7–15.6)
>221 pmol/L % (n)
(95% CI)
77.3(51)
(65.3–86.7)
78.9(112)
(71.2–85.3)
78.4(163)
(72.1–83.8)
MMA (nmol/L) Median
(p25–p75)
187
(145–247)
177.5
(143–269)
180
(143–266)
HoloTC (pmol/L) Median
(p25–p75)
67.7
(46.8–121.3)
102.9**
(56–171.3)
180
(143–266)
Folates (nmol/L) Median
(p25–p75)
34.6
(20.3–44.9)
36.6*
(25.3–61.5)
36
(24.253.8)
>45.3 nmol/L % (n)
(95% CI)
24.3(18)
(15.1–35.7)
34.1(57)γ
(27.0–41.9)
31.1(75)
(25.3–37.4)
Homocysteine (μmol/L) Median
(p25–p75)
11.3
(9.3–12.7)
10.6
(8.7–13.2)
10.8
(8.7–13.1)
  1. Results are expressed as median (p25–p75) and % (n) and 95% CI
  2. MMA methylmalonic acid, HoloTC holotranscobalamin
  3. *p = 0.0499, two-sample Wilcoxon rank sum test; **p = 0.029; γ p = 0.031, Chi2 test