Association between Serum Total Testosterone Level and Bone Mineral Density in Middle-Aged Postmenopausal Women
Table 1
Weighted characteristics of study population based on serum total testosterone level quartiles.
Serum total testosterone levels (ng/dL)
Q1 (≤11)
Q2 (>11, ≤16.15)
Q3 (>16.15, ≤21.55)
Q4 (>21.55)
value
Age (years)
53.2 ± 4.8
52.2 ± 5.1
52.9 ± 4.7
52.6 ± 4.6
0.101
Race/ethnicity (%)
0.012
Non-Hispanic white
66.0
63.9
73.6
78.1
Non-Hispanic black
12.9
13.2
11.3
11.1
Mexican American
8.9
9.4
5.3
3.7
Other race/ethnicity
12.2
13.4
9.7
7.0
Education level (%)
0.024
Less than high school
11.5
16.5
11.2
13.5
High school
20.4
20.6
20.1
29.3
More than high school
68.2
62.9
68.6
57.2
Age since menopause (years)
10.5 ± 7.9
8.3 ± 6.5
7.6 ± 5.9
8.1 ± 7.5
<0.001
Body mass index (kg/m2)
29.1 ± 7.0
30.5 ± 7.0
30.2 ± 6.8
31.6 ± 8.3
0.001
Income to poverty ratio
3.3 ± 1.6
3.0 ± 1.6
3.2 ± 1.7
3.2 ± 1.6
0.448
Moderate recreational activities (%)
0.525
Yes
44.7
44.0
49.3
43.6
No
55.3
56.0
50.7
56.4
Blood urea nitrogen (mmol/L)
5.1 ± 1.5
4.7 ± 1.6
4.8 ± 1.7
4.6 ± 1.8
0.004
Serum uric acid (umol/L)
288.0 ± 75.9
284.7 ± 65.7
296.0 ± 75.7
294.0 ± 72.3
0.259
Total protein (g/L)
70.4 ± 4.4
71.0 ± 4.8
70.2 ± 4.6
70.4 ± 4.5
0.284
Serum phosphorus (mmol/L)
1.26 ± 0.16
1.23 ± 0.16
1.26 ± 0.16
1.23 ± 0.15
<0.001
Serum calcium (mmol/L)
2.37 ± 0.09
2.35 ± 0.08
2.35 ± 0.08
2.36 ± 0.10
0.114
Lumbar bone mineral density (mg/cm2)
951.3 ± 139.5
986.1 ± 151.8
992.5 ± 149.0
1009.6 ± 147.6
<0.001
Mean ± SD for continuous variables: value was calculated by weighted linear regression model. % for categorical variables: value was calculated by the weighted chi-square test.
