Table 2

Urine bisphenol A (BPA) concentrations (ng/mL) and daily intake estimates (μg/day) among study participants
Group  Geometric mean (95%CI)    Percentile (not corrected by SG) p-Value
Corrected by SG Not corrected by SG Minimum 25% 50% 75% Maximum
Urine BPA All 0.40 (0.33, 0.49) 0.45 (0.37, 0.55) 0.05 0.2 0.6 1.37 16.3
Daily intake estimate All 0.33 (0.27, 0.41) 0.37 (0.29,0.45) 0.03 0.12 0.48 1.26 1.96
Age (years)
Urine BPA 8-11 0.32 (0.25, 0.43) 0.31 (0.23, 0.41) 0.05 0.1 0.35 1.05 14.00 P<0.001a
12-15 0.53 (0.40, 0.70) 0.72 (0.54, 0.94) 0.05 0.35 0.85 1.91 16.3
Daily intake estimate 8-11 0.19 (0.15, 0.25) 0.19 (0.14,0.24) 0.03 0.06 0.21 0.63 8.64 P<0.001a
12-15 0.63 (0.48, 0.84) 0.86 (0.65,1.13) 0.06 0.42 1.02 2.30 19.56
Sex
Urine BPA Female 0.43 (0.33, 0.58) 0.46 (0.35, 0.63) 0.05 0.2 0.55 1.48 16.30 P = 0.812b
Male 0.38 (0.29, 0.50) 0.43 (0.33, 0.58) 0.05 0.2 0.63 1.2 10.90
Daily intake estimate Female 0.35 (0.26, 0.48) 0.38 (0.28,0.52) 0.03 0.12 0.48 1.47 19.56 P = 0.939b
Male 0.31 (0.23, 0.41) 0.35 (0.26,0.48) 0.03 0.15 0.48 1.20 13.08
BMI
Urine BPA Normal weight 0.33 (0.25, 0.45) 0.33 (0.25, 0.45) 0.05 0.1 0.35 1.05 14.40 P = 0.018c
Overweight 0.37 (0.24, 0.58) 0.47 (0.30, 0.74) 0.05 0.16 0.78 1.35 11.00
Obesity 0.57 (0.42, 0.78) 0.68 (0.49, 0.95) 0.05 0.35 0.78 1.79 16.30
Daily intake estimate Normal weight 0.26 (0.19, 0.36) 0.26 (0.19,0.36) 0.03 0.06 0.30 1.08 10.26 P = 0.032c
Overweight 0.33 (0.20, 0.53) 0.41 (0.25,0.69) 0.03 0.13 0.56 1.49 13.20
Obesity 0.47 (0.34, 0.65) 0.56 (0.40,0.80) 0.03 0.29 0.66 1.59 19.56

Abbreviation: CI (confidence interval), SG (specific gravity).

a Analysis of variance for urine BPA and daily intake estimate uncorrected by SG adjusted for sex.

b Analysis of variance for urine BPA and daily intake estimate uncorrected by SG adjusted for age.

c Analysis of variance for urine BPA and daily intake estimate uncorrected by SG adjusted for age and sex.

Wang et al.

Wang et al. Environmental Health 2012 11:79   doi:10.1186/1476-069X-11-79

Open Data