Table 2.
Unadjusted and adjusted geometric mean ratios of urinary bisphenol A levels, according to sealant and restoration exposure.
| TREATMENT EXPOSURE | NO. | BPA GEOMETRIC MEAN (WEIGHTED) | UNADJUSTED BPA GEOMETRIC MEAN RATIO (95% CONFIDENCE INTERVALS) | P VALUE | ADJUSTED BPA GEOMETRIC MEAN RATIO (95% CONFIDENCE INTERVALS) | P VALUE |
|---|---|---|---|---|---|---|
| Sealants | n = 1,000 | n = 873 | ||||
| Zero | 661 | 3.54 | 1.00 (reference) | 1.00 (reference) | ||
| One to three | 151 | 3.75 | 1.06 (0.86, 1.30) | 0.57 | 1.05 (0.88, 1.27) | 0.55 |
| Four to six | 124 | 3.35 | 0.95 (0.76, 1.19) | 0.62 | 0.95 (0.76, 1.18) | 0.61 |
| Seven to 16 | 64 | 4.34 | 1.23 (0.93, 1.62 | 0.14 | 1.25 (0.86, 1.82) | 0.23 |
| Restorations | n = 1,001 | n = 873 | ||||
| Zero | 501 | 3.42 | 1.00 (reference) | 1.00 (reference) | ||
| One to three | 185 | 4.14 | 1.21 (0.95, 1.54) | 0.11 | 1.22 (1.01, 1.48) | 0.04 |
| Four to six | 102 | 3.42 | 1.00 (0.77, 1.29) | 0.99 | 1.09 (0.82, 1.45) | 0.53 |
| Seven to 42 | 213 | 3.61 | 1.05 (0.78, 1.42) | 0.71 | 1.20 (0.94, 1.53) | 0.13 |
| Sealants (10-unit change) | 1.18 (0.94, 1.49) | 0.15 | 1.11 (0.82, 1.52) | 0.47 | ||
| Restorations (10-unit change) | 0.99 (0.80, 1.23) | 0.95 | 1.06 (0.90, 1.26) | 0.45 | ||
*Adjusted for child's age, sex, race or ethnicity, urinary creatinine and serum cotinine concentrations, body mass index, parent's education status, and number of sealants (for restoration estimates) or restorations (for sealant estimates).