Table 2.
Multivariate Linear Regression Analyses for serum sex hormone levels associated with vasectomy.
| Regression coefficient (95% CI) | |||
|---|---|---|---|
| Model 1 | Model 2 | Model 3 | |
| TT | 0.25 (−0.29, 0.80) | 0.27 (−0.27, 0.81) | 0.07 (−0.48, 0.58) |
| SHBG | −0.004 (−0.05, 0.04) | −0.002 (−0.04, 0.04) | −0.02 (−0.06, 0.02) |
| LH | 0.03 (−0.02, 0.08) | 0.04 (−0.02, 0.09) | 0.03 (−0.02, 0.08) |
| cfT | 0.01 (−0.00, 0.02) | 0.006 (−0.003, 0.02) | 0.004 (−0.01, 0.01) |
| FTI | 0.004 (−0.01, 0.02) | 0.004 (−0.009, 0.02) | 0.004 (−0.01, 0.02) |
| TSI | −0.03 (−0.21, 0.15) | −0.03 (−0.22, 0.15) | −0.07 (−0.25, 0.12) |
| PSA | 0.08 (−0.03, 0.20) | 0.09 (−0.02, 0.21) | 0.09 (−0.21, 0.03) |
| fPSA | 0.09 (−0.02, 0.20) | 0.10 (−0.01, 0.21) | 0.10 (−0.01, 0.21) |
| fPSA/PSA | 0.001 (−0.009, 0.011) | 0.001 (−0.009, 0.011) | 0.002 (−0.008, 0.01) |
TT = total testosterone; SHBG = sex hormone-binding globulin; LH = luteinizing hormone; cfT = calculated free testosterone.
FTI = free testosterone index; TSI = testosterone secreting index; PSA = prostate specific antigen; fPSA = free prostate specific antigen.
Predictors of model 1 = adjust age; Predictors of model 2 = predictors in model 1 + BMI + weight + abdomen circumference; Predictors of model 3 = predictors in model 2 + smoking and drinking status + education + married status + residence.