Table 1

Characteristics of the study population

Unadjusted urinary BPA at visit 1 (n=94)
 Median (IQR)1.01 (2.01)
 95% CI1.19 to 2.57
 Mean (SD)1.88 (2.68)
 No of samples below LoQ (0.1 ng/mL)15
 Minimum value (ng/mL)0.07
 Maximum value (ng/mL)13.55
Creatinine-adjusted urinary BPA at visit 1 (n=94)
 Median (IQR)1.22 (1.99)
 95% CI1.16 to 1.20
 Mean (SD)1.58 (1.64)
 No of samples below LoQ (0.1 ng/mL)15
 Minimum value (ng/mL)0.05
 Maximum value (ng/mL)8.56
Unadjusted urinary BPA at visit 2 (n=94)
 Median (IQR)1.47 (2.87)
 95% CI1.59 to 3.97
 Mean (SD)2.78 (4.64)
 No of samples below LoQ (0.1 ng/mL)12
 Minimum value (ng/mL)0.07
 Maximum value (ng/mL)31.2
Creatinine-adjusted urinary BPA at visit 2 (n=94)
 Median (IQR)1.24 (2.51)
 95% CI1.21 to 5.01
 Mean (SD)3.13 (7.36)
 No of samples below LoQ (0.1 ng/mL)12
 Minimum value (ng/mL)0.04
 Maximum value (ng/mL)53.42
Unadjusted ΔBPA (n=94)
 Median (IQR)0.06 (2.09)
 95% CI0.05 to 1.75
 Mean (SD)0.90 (3.32)
 Minimum value−6.42
 Maximum value17.64
Adjusted ΔBPA (n=94)
 Median (IQR)0.05 (2.94)
 95% CI−0.28 to 3.39
 Mean (SD)1.55 (7.16)
 Minimum value−4.47
 Maximum value50.38
BPA risk score (n=94)
 Median (IQR)17.0 (11.0)
 95% CI15.4 to 18.8
 Mean (SD)17.1 (6.63)
Demographics (n=94)
 Sex (%) male44
 Exposure to oestrogens (%) of cohort15
 BMI, median (IQR)20.7 (3.43)
 BMI, mean (SD)21.3 (3.13)
  • A complete dataset was available on 94 out of 108 participants. The units of BPA and BMI are ng/mL and kg/m2, respectively. Urinary BPA levels are given both as unadjusted data and as a BPA (ng/mL) to creatinine (mg/mL) ratio.

  • BMI, body mass index; BPA, bisphenol A; LoQ, limit of quantification.