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Urine level of toxic metals of two groups. (µg/L)
| Toxic metals | Cr* | Cd | Se | As | Hg |
|---|---|---|---|---|---|
| Case group, average（standard difference） | 2.67 (3.94) | 0.46 (0.49) | 20.32 (13.22) | 28.77 (34.71) | 0.49 (0.41) |
| Control group, n（%） | 1.71 (2.51) | 0.49 (0.49) | 22.00 (15.13) | 27.31 (32.47) | 0.64 (1.36) |
| P value | 0.046 | 0.696 | 0.408 | 0.763 | 0.287 |
Indicates the items of significant differences.
