Table 3.
Creatinine-adjusted urinary mercury concentration of participants with and without amalgam-filled tooth surfaces
| Survey | Creatinine-adjusted urinary mercury concentration |
||||||
|---|---|---|---|---|---|---|---|
| Total (n, mean ± SE*) | Participants without amalgam-filled TS (n, mean ± SE*) | Participants with amalgam-filled TS (n, mean ± SE*) | P-value | ||||
| Baseline | 463 | 1.04 ± 0.02 | 207 | 0.90 ± 0.03 | 256 | 1.15 ± 0.03 | <0.001 |
| First follow up | 367 | 1.18 ± 0.02 | 169 | 1.09 ± 0.03 | 198 | 1.26 ± 0.03 | <0.001 |
| Second follow up | 348 | 1.23 ± 0.05 | 170 | 0.91 ± 0.05 | 178 | 1.53 ± 0.09 | <0.001 |
*
Unit: μg/g of creatinine; SE, standard error.