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Table 1 Baselines characteristics of participants

From: The association of body mass index and weight waist adjustment index with serum ferritin in a national study of US adults

Characteristic

Group 1

Group 2

P-value

Sample size

3768

3784

 

Questionnaire information

   

Gender (%)

  

 < 0.001

 Male

28.37

69.39

 

 Female

71.63

30.61

 

Age (yrs)

45.92 ± 17.23

50.67 ± 16.47

 < 0.001

Race (%)

  

0.98

 White

63.53

63.36

 

 Black

10.79

10.84

 

 Other race

25.67

25.80

 

Educational level (%)

  

0.01

 Less than high school

9.67

11.06

 

 High school

26.19

27.96

 

 More than high school

64.14

60.99

 

PIR (%)

  

<0.001

 <2.28

33.51

29.03

 

 ≥2.28

55.53

60.65

 

 Unclear

10.96

10.32

 

Hypertension (%)

  

0.002

 Yes

28.44

36.63

 

 No

71.56

63.37

 

Diabetes (%)

  

 < 0.001

 Yes

9.98

12.70

 

 No

87.99

84.14

 

 Borderline

2.04

3.16

 

Physical activity (%)

  

0.02

 Vigorous

46.01

49.95

 

 Moderate

30.37

28.75

 

 Never

23.62

21.30

 

Sedentary time (min)

401.10 ± 724.98

386.98 ± 586.58

0.35

Smoking (%)

  

 < 0.001

 Now

17.22

16.41

 

 Ever

22.55

29.59

 

 Never

60.22

54.00

 

Received blood transfusion (%)

  

0.17

 Yes

10.10

8.98

 

 No

88.40

89.24

 

 Unclear

1.50

1.78

 

Dietary Information

   

Energy (kcal) (%)

  

 < 0.001

 < 1915

43.53

35.13

 

 ≥ 1915

38.99

47.54

 

 Unclear

17.48

17.33

 

Protein (gm) (%)

  

 < 0.001

 < 72.58

45.38

32.77

 

 ≥ 72.58

37.14

49.90

 

 Unclear

17.48

17.33

 

Sugar (gm) (%)

  

0.89

 < 88.29

41.91

41.51

 

 ≥ 88.29

40.61

41.16

 

 Unclear

17.48

17.33

 

Fat (gm) (%)

  

 < 0.001

 < 76.97

43.73

34.14

 

 ≥ 76.97

38.79

48.53

 

 Unclear

17.48

17.33

 

Iron (mg) (%)

  

 < 0.001

  < 12.05

40.83

36.30

 

 ≥ 12.05

41.70

46.37

 

 Unclear

17.48

17.33

 

Alcohol (gm) (%)

  

 < 0.001

 < 0

58.51

53.06

 

 ≥ 0

24.02

29.61

 

 Unclear

17.48

17.33

 

Laboratory examination information

   

WBC (1000 cells/UL)

7.27 ± 2.22

7.37 ± 5.56

0.27

Hb (g/dl)

13.70 ± 1.41

14.75 ± 1.30

 < 0.001

FPG (mg/dl)

96.24 ± 26.37

102.42 ± 35.20

 < 0.001

Serum iron (ug/dl)

14.74 ± 6.45

17.09 ± 5.88

 < 0.001

TC (mg/dl)

184.99 ± 39.16

191.15 ± 41.74

 < 0.001

TG (mg/dl)

125.58 ± 89.58

155.02 ± 110.54

 < 0.001

HDL (mg/dl)

56.45 ± 16.03

50.88 ± 15.02

 < 0.001

LDL (mg/dl) (%)

  

 < 0.001

 < 106

25.73

19.76

 

 ≥ 106

23.80

27.62

 

 Unclear

50.47

52.61

 

Hs-CRP (mg/L)

3.43 ± 5.57

4.14 ± 9.14

 < 0.001

Physical examination information

   

 BMI (kg/m2)

29.40 ± 7.63

30.25 ± 6.63

 < 0.001

 WWI

11.02 ± 0.86

11.07 ± 0.80

0.008

  1. Mean ± SD for continuous variables: P-value was calculated by weighted linear regression model
  2. % for Categorical variables: P-value as calculated by weighted chi-square test
  3. Group 1: Serum ferritin < 109 ng/ml; Group 2: Serum ferritin ≥ 109 ng/ml
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European Journal of Medical Research

ISSN: 2047-783X

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