Table 2.
Distribution of urinary BPA concentrations (ng/mL) and intraclass correlation coefficients among 83 males and 83 females.
| Sample type | n | n > LOQ (%) | Minimum | Percentile | Maximum | GM (95% CI) | ICC (95% CI) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5th | 25th | 50th | 75th | 95th | |||||||
| All subjects | 2,614 | 2,318 (88.7) | < LOQ | < LOQ | 1.27 | 2.40 | 4.59 | 14.8 | 160 | 2.52 (2.27, 2.79) | 0.15 (0.11, 0.19) |
| Male | 618 | 558 (90.3) | < LOQ | < LOQ | 1.43 | 2.64 | 4.94 | 17.5 | 92.9 | 2.78 (2.39, 3.22) | 0.18 (0.11, 0.26) |
| Female | 1,996 | 1,760 (88.2) | < LOQ | < LOQ | 1.22 | 2.33 | 4.44 | 14.2 | 160 | 2.44 (2.15, 2.77) | 0.11 (0.08, 0.16) |
| First-morning urine | 2,498 | 2,218 (88.8) | < LOQ | < LOQ | 1.28 | 2.40 | 4.61 | 15.1 | 160 | 2.53 (2.28, 2.81) | 0.15 (0.11, 0.20) |
| Male | 574 | 520 (90.6) | < LOQ | < LOQ | 1.44 | 2.65 | 5.10 | 17.7 | 92.9 | 2.81 (2.41, 3.29) | 0.18 (0.11, 0.26) |
| Female | 1,924 | 1,698 (88.3) | < LOQ | < LOQ | 1.24 | 2.36 | 4.48 | 14.2 | 160 | 2.45 (2.15, 2.78) | 0.11 (0.08, 0.16) |
| Spot urine | 116 | 100 (86.2) | < LOQ | < LOQ | 1.04 | 2.17 | 4.40 | 13.8 | 47.2 | 2.27 (1.86, 2.78) | — |
| Male | 44 | 38 (86.4) | < LOQ | < LOQ | 1.25 | 2.53 | 4.37 | 9.02 | 20.4 | 2.32 (1.69, 3.18) | — |
| Female | 72 | 62 (86.1) | < LOQ | < LOQ | 1.04 | 1.93 | 4.40 | 22.3 | 47.2 | 2.25 (1.73, 2.93) | — |
| Abbreviations: ICC, intraclass correlation coefficient; LOQ, limit of quantification. The LOQ was 0.75 ng/mL and values < LOQ were replaced with LOQ divided by the square root of 2 or 0.53 ng/mL. | |||||||||||