| Parameter | Estimate | Stderr | z | P-value |
| Intercept | −1.1302 | 0.0651 | −17.36 | <0.0001 |
| IRA | 0.2379 | 0.1273 | 1.87 | 0.0616 |
| Gender | −0.1649 | 0.0901 | −1.83 | 0.0673 |
| Cavit | 0.6235 | 0.0795 | 7.84 | <0.0001 |
| Loose | 0.0818 | 0.081 | 1.01 | 0.3126 |
| Able | −0.2715 | 0.086 | −3.16 | 0.0016 |