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Table 1 Characteristics of subjects

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 = 77)
Women
(n = 172)
Total
(n = 249)
Age (years)a
 mean ± SD 73.5 ± 2.7 73.9 ± 3.1 73.8 ± 3.0
 95% CI 72.9–74.1 73.5–74.4 73.4–74.2
 Education (years)
 median (p25–p75)b 6 (4–8) 6 (8–3) 6 (8–3)
 ≤6 years % (n)c 56.6 (43) 63.7 (107) 61.5 (150)
 95% CI 44.7–67.9 55.9–71.0 55.1–67.6
Medication (number)***c
 0, % (n) 23.4 (18) 11.1 (19) 14.9 (37)
 95% CI 14.5–34.4 6.8–16.7 10.7–19.9
 1, % (n) 19.5 (15) 10.5 (18) 13.3 (33)
 95% CI 11.3–30.1 6.3–16.0 9.3–18.1
 2–3, % (n) 36.4 (28) 34.9 (60) 35.3 (88)
 95% CI 25.7–48.1 27.8–42.5 29.4–41.6
 4+, % (n) 20.8 (16) 43.6 (75) 36.6 (91)
 95% CI 12.4–31.5 36.1–51.4 30.5–42.9
MMSE*b
 median (p25–p75) 28 (26–29) 27 (25–29) 27 (25–29)
BMI*a    
 BMI*a mean ± SD 26.9 ± 3.2 28.5 ± 5.1 28.1 ± 4.7
 95% CI 26.2–27. 7 27.7–29.3 27.4–28.6
Tobacco consumption**c
 % (n) 10.5 (8) 5.8 (10) 7.3 (18)
 CI 95% 4.6–19.4 2.8–10.4 4.3–11.2
  1. Medications frequently used in elderly: antihypertensive, anti-inflammatory, antidepressant
  2. BMI Body Mass Index, MMSE Minimental state examination
  3. *p < 0.05; **p < 0.01; ***p < 0.001
  4. aTwo-sample mean-comparison test
  5. bTwo-sample Wilcoxon rank-sum test
  6. cPearson’s Chi2 test