Minimum | Maximum | Mean (SD) | |
---|---|---|---|
BPA levels in the urine (ng g−1) | |||
Before bracket bonding (T0) | 0.9 | 3.8 | 2.21 (0.99)a |
24 h after bracket bonding (T1) | 1.2 | 10.7 | 5.27 (2.62)b |
1 week after bracket bonding (T2) | 1.5 | 9.6 | 4.41 (2.14)b |
Increases in BPA levels in the urine (ng g−1) | |||
Increases at 24 h (T1–T0) | 0.3 | 8.1 | 3.06 (2.2) |
Increases at 1 week (T2–T0) | 0.3 | 6.8 | 2.21 (1.8) |