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方差膨胀因子共线性分析
| Environmental factor | VIF value | |
| Before screening | After screening | |
| VIF: variance inflation factor. | ||
| Age | 1.08610272033186 | 1.08610272033186 |
| Smoking history | 1.37991739233775 | 1.37991739233775 |
| Sex | 1.36666770970373 | 1.36666770970373 |
| Personal history of cancer | 1.01563553235591 | 1.01563553235591 |
