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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.