| Dependent variable | Independent variable | B | SE | β | t | p-value | Collinearity diagnostics | |
| tolerance | VIF | |||||||
| UCS | (Constant) | 3.64 | 0.11 |
| 33.32*** | 0.000 |
|
|
| PITR RS | 0.03 | 0.01 | 0.24 | 3.48** | 0.001 | 0.99 | 1.00 | |
| Service period | −0.02 | 0.01 | −0.15 | −2.25* | 0.025 | 0.99 | 1.00 | |
| R (0.288), R2 (0.083), ΔR2 (0.073), F (8.812), p-value (0.000), Durbin-Watson (2.06) | ||||||||