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Table 1 Characteristics of the participants

From: Association between serum iron and liver transaminases based on a large adult women population

Iron (ug/dL)

All (n = 19,185)

Q1 (n = 4738)

Q2 (n = 4843)

Q3 (n = 4797)

Q4 (n = 4807)

P value

Age (years)

45.71 ± 18.63

42.09 ± 16.10

46.83 ± 17.33

47.08 ± 17.39

44.22 ± 17.09

 < 0.001

BMI (kg/m2)

29.31 ± 7.63

31.18 ± 8.60

30.14 ± 7.71

28.51 ± 6.90

26.45 ± 6.08

 < 0.001

Race (%)

 < 0.001

 Mexican American

17.98

11.58

8.01

7.63

7.80

 

 Other Hispanic

9.62

6.91

6.03

5.46

4.83

 

 Non-Hispanic White

39.37

55.64

63.66

68.33

71.84

 

 Non-Hispanic Black

22.35

19.00

14.60

11.08

7.00

 

 Other Races

10.68

6.87

7.69

7.50

8.53

 

Education (%)

 < 0.001

 Less than high school

22.89

18.25

16.21

14.38

12.04

 

 High school or equivalent

20.67

22.97

22.42

21.32

20.61

 

 More than high school

49.68

54.61

58.50

61.43

63.29

 

 Unknown

6.77

4.18

2.87

2.86

4.06

 

Family income-poverty ratio (%)

 < 0.001

 < 1

22.58

19.41

15.49

13.92

13.03

 

 ≥ 1 and < 3

37.82

38.23

33.58

35.06

30.31

 

 ≥ 3

31.14

35.81

44.35

43.70

49.96

 

 Unknown

8.45

6.54

6.58

7.32

6.70

 

Pregnancy (%)

 < 0.001

 Yes

4.50

3.00

2.33

2.53

2.85

 

 No

45.27

59.05

47.30

47.14

50.79

 

 Unknown

50.23

37.95

50.38

50.32

46.36

 

Alcohol drinking (%)

 < 0.001

 Moderate drinker

22.90

24.34

27.26

27.12

27.55

 

 Heavy drinker

30.40

33.54

32.60

34.17

42.27

 

 Unknown

46.70

42.13

40.14

38.71

30.18

 

Smoking exposure (%)

 < 0.001

 Unexposed

29.18

27.73

31.20

32.30

34.48

 

 Low-exposure

51.96

52.37

51.28

47.33

44.16

 

 High-exposure

18.86

19.90

17.52

20.37

21.36

 

Work activity (%)

0.013

 Never

50.05

47.94

47.09

47.26

45.65

 

 Moderate

17.18

18.57

18.90

19.89

20.74

 

 Vigorous

9.10

10.39

9.83

9.11

10.83

 

 Unknown

23.67

23.10

24.17

23.74

22.77

 

ALT (U/L)

20.59 ± 15.81

19.38 ± 11.60

20.80 ± 13.93

21.04 ± 13.85

20.97 ± 15.36

 < 0.001

AST (U/L)

22.89 ± 14.85

21.84 ± 10.22

22.76 ± 12.70

22.94 ± 12.63

23.53 ± 15.39

 < 0.001

Cholesterol (mg/dL)

195.74 ± 42.07

189.41 ± 39.59

196.47 ± 41.75

199.78 ± 41.52

200.57 ± 41.73

 < 0.001

Glucose (mg/dL)

98.68 ± 36.30

97.90 ± 34.11

98.81 ± 35.62

95.85 ± 27.52

92.42 ± 24.49

 < 0.001

Triglycerides (mg/dL)

132.75 ± 102.40

130.38 ± 89.34

137.49 ± 130.08

132.80 ± 92.86

122.47 ± 92.71

 < 0.001

HBP (%)

28.38

25.10

29.32

26.57

20.99

 < 0.001

Diabetes (%)

10.86

10.29

10.47

7.70

4.89

 < 0.001

CKD (%)

2.32

2.24

1.91

1.08

1.06

 < 0.001

  1. Mean ± SD for continuous variables: P value was calculated by weighted linear regression model; (%) for Categorical variables: P value was calculated by weighted chi-square test
  2. ALT alanine aminotransferase, AST aspartate aminotransferase, BMI body mass index, HBP high blood pressure, CKD chronic kidney disease
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Journal of Health, Population and Nutrition

ISSN: 2072-1315

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