| Characteristic1 | Stepwise Regression Equation | R-square | P-value |
| Motility, % | 81.26 + 0.15 (LIN) − 14.15 (AREA) | 0.99 | 0.021 |
| Progressive, % | −73.38 + 1.68 (MED) + 0.59 (VAP) | 0.99 | 0.038 |
| Rapid, % | −60.22 + 1.54 (MED) + 0.49 (VAP) | 0.99 | 0.075 |
| VAP, µm/s | −28.38 + 0.21 (Progressive) + 2.15 (ELONG) | 0.99 | 0.033 |
| VSL, µm/s | −154.34 + 2.4 (VAP) − 1.4 (LIN) | 0.99 | 0.021 |
| VCL, µm/s | −739.85 + 4.86 (VCL) − 14.81 (ALH) | 0.99 | 0.01 |