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Table 1 Characteristics of the study population according to dietary selenium intake

From: The association between dietary selenium intake and diabetes: a cross-sectional study among middle-aged and older adults

n Se intake P #
Q1 (lowest) Q2 Q3 Q4 (highest)
1357 1356 1356 1354 -
Median Se intake (μg/day) 22.95 35.07 45.48 62.68 -
Age 53.54 ± 7.76 53.40 ± 7.47 52.89 ± 7.57 52.38 ± 7.27 0.00
Sex (% female) 60.6 52.3 41.9 32.6 0.00
Education level (% with or above high school background) 35.9 44.2 50.8 56.2 0.00
Employment (% manual worker) 29.0 20.3 16.0 15.7 0.00
BMI (kg/m2) 24.03 ± 3.28 24.33 ± 3.15 24.50 ± 3.16 24.99 ± 3.06 0.00
Activity level (h/week) 2.25 ± 3.82 2.19 ± 3.42 2.21 ± 3.35 2.42 ± 3.53 0.00
Waist circumference (cm) 81.51 ± 9.10 82.58 ± 8.80 83.10 ± 8.83 84.63 ± 8.68 0.00
Hypertension (%) 32.6 32.7 32.6 33.7 0.92
Drinking (%) 26.2 33.0 36.2 48.3 0.00
Smoking (%) 16.9 21.8 24.9 28.2 0.00
Nutritional supplementation (%) 29.1 35.9 36.4 39.4 0.00
Energy intake (Kcal/day) 1036.84 ± 9.63 1392.87 ± 321.78 1703.74 ± 388.07 2419.71 ± 1010.46 0.00
Fiber intake (g/day) 9.63 ± 6.86 15.00 ± 8.78 19.40 ± 10.68 29.00 ± 18.73 0.00
FG (mmol/L) 5.66 ± 1.52 5.62 ± 1.45 5.75 ± 1.70 5.84 ± 1.83 0.01
  1. Se: selenium, BMI: body mass index, FG: fasting plasma glucose.
  2. Data are mean ± standard deviation, unless otherwise indicated.
  3. #P values are for test of difference across all quartiles of selenium intake.