Table 9.
Correlation analysis of nine metals in the hair of students.
| Pb | Cd | Cu | Fe | Mn | Cr | Ni | Zn | Hg | |
|---|---|---|---|---|---|---|---|---|---|
| Pb | - | ||||||||
| Cd | 0.660 *** | - | |||||||
| Cu | 0.346 *** | 0.366 *** | - | ||||||
| Fe | 0.555 *** | 0.478 *** | 0.136 ** | - | |||||
| Mn | 0.470 *** | 0.435 *** | 0.410 *** | 0.163 ** | - | ||||
| Cr | 0.253 *** | 0.262 *** | 0.322 *** | 0.103 * | 0.318 *** | - | |||
| Ni | 0.195 *** | 0.180 *** | 0.523 *** | −0.082 | 0.533 *** | 0.336 *** | - | ||
| Zn | 0.095 | 0.010 | 0.221 *** | −0.026 | 0.272 *** | 0.007 | 0.384 *** | - | |
| Hg | −0.010 | −0.022 | 0.163 ** | −0.053 | −0.039 | 0.121 * | 0.117 * | −0.105 * | - |
Note: *** p < 0.001, ** p < 0.01, * p < 0.05, correlation analysis.