Table 5. Nonparametric (Spearman) correlation coefficients between semen parameters and age and serum reproductive hormones.
| Variable | Age | Serum LH | Serum FSH | Serum TT | Serum E2 | Serum SHBG |
|---|---|---|---|---|---|---|
| Age | - | -0.102b | 0.130b | -0.115b | -0.024 | 0.010 |
| Semen volume | -0.012 | 0.003 | 0.027 | 0.015 | -0.059 | 0.085b |
| SC | 0.038 | -0.045 | -0.171a | 0.038 | 0.005 | -0.003 |
| TSC | 0.044 | -0.043 | -0.166a | 0.037 | -0.001 | 0.021 |
| PR | -0.048 | -0.086b | -0.038 | 0.006 | 0.019 | -0.001 |
| MOT | -0.062 | -0.069 | -0.089b | 0.021 | 0.020 | -0.006 |
| NSM | 0.008 | -0.116b | -0.119b | 0.001 | 0.054 | -0.053 |
| TNPMS | 0.016 | -0.085b | -0.164a | 0.032 | 0.028 | -0.003 |
SC, sperm concentration; TSC, total sperm count; PR, progressive motility; MOT, sperm motility; NSM, normal sperm morphology; TNPMS, total normal-progressively motile sperm count.
a, P ≤ 0.001
b, P ≤ 0.05
Age was positively related to serum FSH level, but negatively related to serum TT and LH levels. Serum LH level was negatively related to PR, NSM and TNPMS, while serum FSH level was negatively related to SC, TSC, MOT, NSM and TNPMS. Serum SHBG level was positively related to semen volume. However, there was no correlation between serum TT and E2 levels and semen parameters such as semen volume, SC, TSC, PR, MOT, NSM and TNPMS.