| Step | Variable | Model Log Likelihood | Change in −2 Log likelihood | df | Sig. of the Change |
| Step 1 |
| −138.539 | 91.428 | 1 | 0.000 |
| Step 2 |
| −123.806 | 84.095 | 1 | 0.000 |
|
| −92.825 | 22.135 | 1 | 0.000 | |
| Step 3 |
| −103.266 | 68.054 | 1 | 0.000 |
|
| −81.758 | 25.039 | 1 | 0.000 | |
|
| −84.449 | 30.420 | 1 | 0.000 | |
| Step 4 |
| −78.531 | 38.330 | 1 | 0.000 |
|
| −73.628 | 28.523 | 1 | 0.000 | |
|
| −69.239 | 19.745 | 1 | 0.000 | |
|
| −80.218 | 41.703 | 1 | 0.000 | |
| Step 5 |
| −59.366 | 4.803 | 1 | 0.028 |
|
| −71.290 | 28.650 | 1 | 0.000 | |
|
| −70.863 | 27.797 | 1 | 0.000 | |
|
| −67.695 | 21.460 | 1 | 0.000 | |
|
| −77.370 | 40.811 | 1 | 0.000 |
