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