| Regression coefficient | Estimated regression coefficient | Regression coefficient | Confidence interval |
| β0 | −44.5673 | −94.8150 | 5.6805 |
| β1 | 0.0790 | 0.0752 | 0.0827 |
| β2 | −0.1682 | −0.2861 | −0.0503 |