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Table 2 BPA levels in urine

From: Association between polymorphisms in genes encoding estrogen receptors (ESR1 and ESR2) and excreted bisphenol A levels after orthodontic bracket bonding: a preliminary study

  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)
  1. Same letters indicate no statistically significant difference