| Equation | Obs | Parms | RMSE | R2 | F-statistics | P-value | |
| Progressive motility | 907 | 5 | 18.04966 | 0.2992 | 96.28511 | 0.0000 | |
| Oval heads | 907 | 15.46425 | 0.2172 | 62.55451 | 0.0000 | ||
|
| Coefficient | Std. err. | t-statistics | P-value | 95% Confidence Interval | ||
|
|
|
|
|
|
| ||
| Progressive Motility | Age | −0.07 | 0.08 | −0.80 | 0.42 | −0.23, 0.10 | |
| BMI | −0.34 | 0.15 | −2.19 | 0.03 | −0.64, −0.03 | ||
| Sperm count | 0.49 | 0.03 | 18.78 | 00001 | 0.44, 0.54 | ||
| Pus cells | −3.04 | 0.70 | −4.37 | 00001 | −4.44, −1.68 | ||
| Constant | 43.66 | 5.61 | 7.77 | 0.00 | 32.63, 54.69 | ||
| Oval head morphology | Age | 0.02 | 0.07 | 0.22 | 0.82 | −0.13, 0.16 | |
| BMI | −0.26 | 0.13 | −1.94 | 0.05 | −0.51, 0.00 | ||
| Sperm count | 0.34 | 0.02 | 15.27 | 0.00 | 0.30, 0.38 | ||
| Pus cells | −1.75 | 0.60 | −2.93 | 0.003 | −2.92, −0.58 | ||
| Constant | 40.95 | 4.81 | 8.51 | 0.000 | 31.50, 50.40 | ||