| 变量名 | (2) | (3) | (4) |
| INF | 0.180** (2.198) | 0.056 (0.654). | 0.222** (2.398) |
| D | 0.257*** (3.263) | −0.034 (−0.412) | 0.187** (2.064) |
| FP | 0.200** (2.508) | 0.205** (2.461). | 0.318*** (3.506) |
| R2 | 0.347 | 0.201 | 0.432 |
| F | 6.993 | 2.158 | 8.009 |
| N | 157 | 157 | 109 |