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Table 1 Baseline characteristics and B vitamin intakes of the participants from EMCOA study (n = 2533)

From: Dietary intakes and biomarker patterns of folate, vitamin B6, and vitamin B12 can be associated with cognitive impairment by hypermethylation of redox-related genes NUDT15 and TXNRD1

Baseline characteristics Overall sample Men Women
(N = 2533) (N = 1165) (N = 1368)
Demographic characteristics
Age 59 (55, 62) 59 (56, 63) 58 (55, 62)
Education years 9 (9, 12) 12 (9, 12) 9 (9, 12)
BMI (kg/m2) 24.5 (22.7, 26.6) 24.9 (23.2, 27.0) 24.2 (22.3, 26.2)
Lifestyle
Current smoker, n(%) 597 (25.4%) 562 (48.2%) 35 (2.6%)
Current drinker, n(%) 634 (26.9%) 560 (48.1%) 74 (5.4%)
Medical history
Diabetes, n(%) 381 (15.0%) 215 (18.5%) 166 (12.1%)
Hypertension, n(%) 834 (32.9%) 425 (36.5%) 409 (29.9%)
Coronary heart disease, n(%) 250 (9.9%) 148 (12.7%) 102 (7.5%)
Dietary B vitamin intakes
Vitamin B6 (mg/day) 2.3 (1.8, 3.0) 2.4 (1.9, 3.3) 2.2 (1.7~2.8)
1st quartile 0.4~1.8 0.5~1.9 0.4~1.7
2nd quartile 1.8~2.3 1.9~2.4 1.7~2.2
3rd quartile 2.3~3.0 2.4~3.3 2.2~2.8
4th quartile 3.0~17.4 3.3~17.4 2.8~9.5
Folate (μg/day) 388.1 (274.8~534.2) 394.8 (277.5, 551.5) 381.1 (271.9, 518.9)
1st quartile 27.0~274.8 31.5~277.5 27.0~271.1
2nd quartile 274.8~388.1 277.5~394.8 271.1~381.1
3rd quartile 388.1~534.2 394.8~551.5 381.1~518.9
4th quartile 534.2~5952.2 551.5~5952.2) 518.9~3132.2
Vitamin B12 (μg/day) 2.1 (1.3, 3.4) 2.5 (1.6, 4.0) 1.9 (1.1, 2.8)
1st quartile 0~1.3 0~1.6 0~1.1
2nd quartile 1.3~2.1 1.6~2.5 1.1~1.9
3rd quartile 2.1~3.4 2.5~4.0 1.9~2.8
4th quartile 3.4~36.5 4.0~36.5 2.8~23.8
  1. BMI body mass index