Table 3 Spearman correlation coefficients within and between PM2.5 metal exposures and total PM2.5 exposure
Al | Cr | Cu | Fe | Mn | Ni | Pb | Zn | |
|---|---|---|---|---|---|---|---|---|
PM2.5 | 0.91 | 0.91 | 0.84 | 0.97 | 0.95 | 0.63 | 0.70 | 0.53 |
Al | 1.00 | 0.91 | 0.67 | 0.82 | 0.89 | 0.40 | 0.66 | 0.50 |
Cr | 1.00 | 0.74 | 0.85 | 0.85 | 0.52 | 0.73 | 0.48 | |
Cu | 1.00 | 0.86 | 0.73 | 0.82 | 0.64 | 0.56 | ||
Fe | 1.00 | 0.91 | 0.69 | 0.65 | 0.50 | |||
Mn | 1.00 | 0.55 | 0.63 | 0.46 | ||||
Ni | 1.00 | 0.49 | 0.40 | |||||
Pb | 1.00 | 0.50 |