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Pearson intercorrelation (r) between PM metals (n=1533)
| PM10 copper | PM10 iron | PM10 zinc | PM2.5 iron | PM2.5 copper | |
| PM10 copper | 1 | ||||
| PM10 iron | 0.85 | 1 | |||
| PM10 zinc | 0.85 | 0.92 | 1 | ||
| PM2.5 iron | 0.82 | 0.91 | 0.93 | 1 | |
| PM2.5 copper | 0.75 | 0.89 | 0.90 | 0.88 | 1 |
PM, particulate matter.
