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Correlation analysis for PM levels inside and outside subway stations.
| Station | PM | Equations | R | Revised R2 | Sig. |
|---|---|---|---|---|---|
| Closed system | PM2.5 | Y = 0.622X+91.093 | 0.880 | 0.742 | 0.020 |
| PM10 | Y = 0.641X+123.335 | 0.992 | 0.981 | 0.000 | |
| Screen door system | PM2.5 | Y = 0.602X+41.534 | 0.940 | 0.866 | 0.000 |
| PM10 | Y = 0.708X+46.103 | 0.991 | 0.980 | 0.000 | |
| Open system | PM2.5 | Y = 0.895X+0.522 | 0.857 | 0.697 | 0.003 |
| PM10 | Y = 0.902X-7.000 | 0.963 | 0.916 | 0.000 |
