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Table 1 Weighted characteristics of the study population based on total testosterone quartiles

From: Association of total testosterone status with bone mineral density in adults aged 40–60 years

Testosterone total (ng/dL)

Total

Q1

Q2

Q3

Q4

P value

Age (years)

49.9 ± 6.1

50.3 ± 5.8

49.6 ± 6.0

50.0 ± 6.0

50.2 ± 6.2

0.0148

Sex (%)

     

< 0.0001

 Male

47.3

0.1

0.0

88.6

99.8

 

 Female

52.7

99.9

100

11.4

0.2

 

Race/ethnicity (%)

     

0.0284

 Non-Hispanic white

14.0

9.7

6.9

7.5

8.4

 

 Non-Hispanic black

34.1

63.0

68.2

67.8

68.2

 

 Mexican American

23.9

12.2

12.2

10.5

10.1

 

 Other race/ethnicity

28.0

15.1

12.7

14.2

13.4

 

Level of education (%)

     

< 0.0001

 Less than high school

23.2

14.1

13.4

13.5

18.0

 

 High school

21.5

18.2

18.6

22.3

22.5

 

 More than high school

55.3

67.7

68.0

64.3

59.5

 

Income to poverty ratio

2.7 ± 1.7

3.2 ± 1.7

3.2 ± 1.7

3.4 ± 1.6

3.2 ± 1.7

0.0106

Total protein (mg/dL)

71.5 ± 4.7

70.3 ± 4.6

70.4 ± 4.4

70.8 ± 4.5

70.9 ± 4.4

0.0013

Serum calcium (mg/dL)

9.4 ± 0.4

9.4 ± 0.4

9.3 ± 0.4

9.4 ± 0.4

9.4 ± 0.3

0.1272

Serum phosphorus (mg/dL)

3.7 ± 0.6

3.9 ± 0.5

3.8 ± 0.5

3.7 ± 0.6

3.6 ± 0.6

< 0.0001

Total BMD (g/cm2)

1.1 ± 0.1

1.1 ± 0.1

1.1 ± 0.1

1.1 ± 0.1

1.1 ± 0.1

< 0.0001

  1. Mean ± SD for continuous variables: the P value was calculated by the weighted linear regression model. (%) for categorical variables: the P value was calculated by the weighted chi-square test. BMD, bone mineral density