Table 1 Basic characteristics of the research population based on total BMD quartiles.

From: Association between triglyceride glucose index and total bone mineral density: a cross-sectional study from NHANES 2011–2018

Total BMD (g/cm2)

Quartile 1 (0.670–1.018)

Quartile 2 (1.019–1.094)

Quartile 3 (1.095–1.167)

Quartile 4 (1.168–1.728)

P value

Age (years)

26.81 ± 14.63

32.21 ± 12.96

34.08 ± 12.22

35.92 ± 11.82

 < 0.0001

Gender (%)

    

 < 0.0001

 Male

44.19

47.20

57.24

76.36

 

 Female

55.81

52.80

42.76

23.64

 

Race/ethnicity (%)

    

 < 0.0001

 Mexican American

15.40

13.09

12.02

8.94

 

 Non-Hispanic White

56.08

59.23

61.18

57.98

 

 Non-Hispanic Black

6.87

7.11

10.27

19.82

 

 Other race/ethnicity

21.64

20.57

16.53

13.26

 

Education level (%)

    

 < 0.0001

 Less than high school

50.56

28.58

21.52

17.38

 

 High school or equivalent

12.72

17.78

22.94

21.59

 

 College or above

36.72

53.64

55.54

61.03

 

Family PIR

2.56 ± 1.64

2.55 ± 1.64

2.86 ± 1.69

2.97 ± 1.64

 < 0.0001

Weight (kg)

65.93 ± 18.85

77.93 ± 21.39

81.68 ± 19.86

88.45 ± 20.00

 < 0.0001

Height (cm)

163.44 ± 9.15

167.61 ± 8.53

170.36 ± 8.94

174.12 ± 7.95

 < 0.0001

BMI (kg/cm2)

24.52 ± 6.13

27.69 ± 7.13

28.16 ± 6.65

29.15 ± 6.22

 < 0.0001

WC (cm)

86.07 ± 16.63

93.84 ± 17.40

95.40 ± 16.58

98.19 ± 15.77

 < 0.0001

Fasting glucose (mg/dL)

97.98 ± 14.60

100.44 ± 22.06

100.69 ± 22.75

104.99 ± 34.19

 < 0.0001

Fasting triglyceride (mg/dL)

92.56 ± 57.73

103.02 ± 62.96

101.87 ± 63.33

105.12 ± 65.01

 < 0.0001

ALP (IU/L)

117.46 ± 91.24

74.95 ± 43.07

68.87 ± 28.77

65.57 ± 23.92

 < 0.0001

BUN (mg/dL)

11.30 ± 3.39

11.80 ± 3.56

12.36 ± 3.70

13.28 ± 4.18

 < 0.0001

CPK (IU/L)

121.48 ± 120.75

135.81 ± 128.26

161.84 ± 311.36

208.20 ± 327.07

 < 0.0001

Creatinine (mg/dL)

0.71 ± 0.16

0.80 ± 0.17

0.84 ± 0.17

0.92 ± 0.18

 < 0.0001

Phosphorus (mg/dL)

4.05 ± 0.74

3.76 ± 0.59

3.67 ± 0.55

3.63 ± 0.55

 < 0.0001

Total calcium (mg/dL)

9.44 ± 0.42

9.38 ± 0.35

9.35 ± 0.32

9.35 ± 0.33

 < 0.0001

Uric acid (mg/dL)

4.96 ± 1.21

5.20 ± 1.25

5.44 ± 1.35

5.72 ± 1.35

 < 0.0001

Total bilirubin (mg/dL)

0.62 ± 0.30

0.63 ± 0.32

0.67 ± 0.35

0.67 ± 0.34

 < 0.0001

Glycohemoglobin (%)

5.33 ± 0.53

5.37 ± 0.70

5.39 ± 0.74

5.51 ± 1.03

 < 0.0001

Total cholesterol (mg/dL)

173.32 ± 37.93

180.02 ± 39.14

181.93 ± 38.24

181.41 ± 36.04

 < 0.0001

HDL-C (mg/dL)

54.65 ± 13.56

52.11 ± 13.42

52.82 ± 15.42

51.09 ± 13.21

 < 0.0001

LDL-C (mg/dL)

100.18 ± 33.35

107.29 ± 34.14

108.73 ± 32.99

109.30 ± 32.27

 < 0.0001

25OHD2 + 25OHD3 (nmol/L)

62.61 ± 22.47

63.49 ± 23.24

64.63 ± 24.00

65.60 ± 24.85

0.0075

TyG

8.24 ± 0.62

8.37 ± 0.63

8.36 ± 0.63

8.42 ± 0.65

 < 0.0001

TyG-BMI

203.71 ± 59.66

233.28 ± 68.14

237.00 ± 65.09

246.60 ± 60.64

 < 0.0001

TyG-WHtR

4.37 ± 1.01

4.72 ± 1.05

4.72 ± 1.04

4.77 ± 0.96

 < 0.0001

TyG-WC

714.47 ± 172.34

790.26 ± 180.75

802.56 ± 176.23

830.79 ± 167.95

 < 0.0001

  1. Mean ± SD for continuous variables: the P value was calculated by the weighted linear regression model. (percentage) for categorical variables: the P value was calculated by the weighted chi-square test.
  2. Family PIR the ratio of family income to poverty, BMI body mass index, WC waist circumference, ALP alkaline phosphatase, BUN blood urea nitrogen, CPK creatine phosphokinase, HDL-C high-density lipoprotein cholesterol, LDL-C low-density lipoprotein cholesterol, TyG triglyceride glucose index, TyG-BMI triglyceride glucose-body mass index, TyG-WHtR triglyceride glucose-waist-to-height ratio, TyG-WC triglyceride glucose-waist circumference.
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