Table 5.
Association of body mass index with testosterone and estradiol using quantile regression
| Variable | Quantiles | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| 10th | 20th | 30th | 40th | 50th | 60th | 70th | 80th | 90th | |
| T | |||||||||
| Model 1 | −0.27* (−0.52 – −0.21) | −0.44* (−0.64 – −0.32) | −0.64* (−0.77 – −0.41) | −0.64* (−0.80 – −0.50) | −0.64* (−0.70 – −0.50) | −0.58* (−0.73 – −0.51) | −0.65* (−0.75 – −0.48) | −0.69* (−0.88 – −0.57) | −0.89* (−0.93 – −0.76) |
| Model 2 | −0.26* (−0.46 – −0.22) | −0.45* (−0.61 – −0.31) | −0.64* (−0.73 – −0.43) | −0.60* (−0.72 – −0.51) | −0.58* (−0.70 – −0.49) | −0.57* (−0.71 – −0.49) | −0.65* (−0.75 – −0.47) | −0.66* (−0.91 – −0.59) | −0.88* (−0.94 – −0.76) |
| E2 | |||||||||
| Model 1 | 0.60* (0.16–1.18) | 0.53* (0.29–0.70) | 0.53* (0.16–0.68) | 0.50* (0.25–0.70) | 0.50* (0.35–0.68) | 0.49* (0.17–0.67) | 0.34* (0.16–0.68) | 0.20 (−0.09–0.64) | 0.26 (−0.28–0.63) |
| Model 2 | 0.55* (0.39–1.05) | 0.60* (0.28–0.77) | 0.52* (0.22–0.71) | 0.52* (0.25–0.67) | 0.47* (0.36–0.64) | 0.42* (0.14–0.69) | 0.36* (0.06–0.78) | 0.20* (0.04–0.54) | 0.25 (−0.27–0.61) |
*P<0.05. Data are presented as β (95% CI). Model 1 includes BMI only; Model 2 includes BMI and age. T: testosterone; E2: estradiol; β: regression coefficients; CI: confidence interval; BMI: body mass index