| Variable | Coefficient Variance | Uncentered VIF | Centered VIF |
| C | 7.72E−05 | 1.000000 | NA |
| PM2.5 | 0.000451 | 5.833811 | 5.833811 |
| O3 | 8.26E−05 | 1.068953 | 1.068953 |
| NO2 | 0.000188 | 2.429886 | 2.429886 |
| SO2 | 0.000143 | 1.844446 | 1.844446 |
| CO | 0.000663 | 8.583081 | 8.583081 |