Table 3. Simple linear regression analyses of prostate-specific antigen fluctuation and clinical parameters.
| Variables | Coefficient B | SE | P value |
|---|---|---|---|
| Age (year) | -0.059 | 0.170 | 0.728 |
| PSA1 (ng/mL) | 3.404 | 0.392 | <0.001 |
| PSA2 (ng/mL) | -3.978 | 0.625 | <0.001 |
| %Free-PSA (%) | 0.163 | 0.165 | 0.325 |
| PSAD (ng/mL/g) | -20.061 | 16.029 | 0.212 |
| Prostate volume (g) | -0.029 | 0.075 | 0.696 |
PSA = prostate-specific antigen, PSA 1 = baseline PSA, PSA 2 = secondary PSA, %Free-PSA = percentage of free PSA, PSAD = PSA density.