Table 3:
Ratio difference in urinary OPE metabolite concentration per interquartile range (IQR) increase in dust OPE parent compound concentration and loading
| Compounds | Time point | Dust concentration (95% CI) | Dust loading (95% CI) | Estimated Ingestion (95% CI) |
|---|---|---|---|---|
| TCEP ➔ BCEP | (Dust IQR) | 8.2-fold increase (237-1950 ng/g) | 10.6-fold increase (53-562 ng/m2) | 9.6-fold increase (0.06-0.57 ng/kg/day) |
| 16 week metabolite | 1.04 (0.84-1.28) | 1.03 (0.85-1.23) | 1.01 (0.81-1.26) | |
| 26 week metabolite | 1.39 (1.12-1.72) | 1.10 (0.92-1.33) | 1.32 (1.08-1.70) | |
| Delivery metabolite | 1.30 (1.04-1.63) | 1.21 (0.99-1.48) | 1.27 (1.01-1.60) | |
| TDCIPP ➔ BDCIPP | (Dust IQR) | 4.4-fold increase (880-3890 ng/g) | 5.2-fold increase (193-1011 ng/m2) | 4.6-fold increase (0.23-1.04 ng/kg/day) |
| 16 week metabolite | 1.10 (0.96-1.26) | 0.99 (0.86-1.13) | 1.09 (0.95-1.26) | |
| 26 week metabolite | 1.21 (1.05-1.39) | 0.99 (0.86-1.15) | 1.18 (1.03-1.37) | |
| Delivery metabolite | 1.07 (0.92-1.23) | 1.07 (0.87-1.17) | 1.03 (0.90-1.20) | |
| TPHP ➔ DPHP | (Dust IQR) | 4.0-fold increase (532-2120 ng/g) | 6.8-fold increase (92-632 ng/m2) | 6.2-fold increase (0.14-0.57 ng/kg/day) |
| 16 week metabolite | 1.16 (1.01-1.32) | 1.26 (1.06-1.49) | 1.17 (1.02-1.34) | |
| 26 week metabolite | 1.04 (0.91-1.20) | 1.08 (0.91-1.29) | 1.04 (0.90-1.19) | |
| Delivery metabolite | 0.97 (0.84-1.13) | 0.94 (0.78-1.13) | 0.96 (0.83-1.11) | |
Fold increases represent differences from the 25th to 75th percentile of dust concentrations.
Ratio changes are from fully-adjusted regression models presented in Table 2.
CI: confidence interval