| Parameter | Estimate | Stderr | z | P-value |
| Intercept1 | −1.306 | 0.0827 | −15.79 | <0.0001 |
| IRA_y1 | 0.1447 | 0.1768 | 0.82 | 0.4129 |
| Gender_y1 | −0.1904 | 0.116 | −1.64 | 0.1006 |
| Cavit_y1 | 1.0137 | 0.1059 | 9.58 | <0.0001 |
| Loose_y1 | 0.5367 | 0.1191 | 4.51 | <0.0001 |
| Able_y1 | −0.1008 | 0.1077 | −0.94 | 0.3491 |
| Intercept2 | −1.1788 | 0.0979 | −12.04 | <0.0001 |
| IRA_y2 | 0.4656 | 0.1836 | 2.54 | 0.0112 |
| Gender_y2 | −0.1652 | 0.1323 | −1.25 | 0.2118 |
| Cavit_y2 | 0.3919 | 0.1113 | 3.52 | 0.0004 |
| Loose_y2 | −0.4316 | 0.1245 | −3.47 | 0.0005 |
| Able_y2 | −0.4329 | 0.1257 | −3.44 | 0.0006 |
| Intercept3 | −0.8009 | O. 0945 | − 8.48 | <0.0001 |
| IRA_y3 | 0.328 | 0.1898 | 1.73 | 0.0839 |
| Gender_y3 | −0.1609 | 0.1277 | −1.26 | 0.2075 |
| Cavit_y3 | 0.2894 | 0.1065 | 2.72 | 0.0066 |
| Loose_y3 | −0.4101 | 0.117 | −3.51 | 0.0005 |
| Able_y3 | −0.5959 | 0.1245 | −4.79 | <0.0001 |