Table 5.
Four-year geometric means of urinary PAH metabolite concentrations (ng/g creatinine) within surrogate sample determined exposure quartiles for 100 girls in the BCERP study, CA site.
| Four-year geometric mean of each single year determined quartile
|
||||
|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | |
| 1-naphthol | ||||
| baseline | 1150 | 1140 | 1700 | 2940 |
| year 2 | 907 | 1384 | 1720 | 3050 |
| year 4 | 982 | 1510 | 1420 | 3120 |
| 2-naphthol | ||||
| baseline | 880 | 1480 | 2150 | 3380 |
| year 2 | 945 | 1360 | 2170 | 3400 |
| year 4 | 997 | 1460 | 1850 | 3530 |
| Σfluorene | ||||
| baseline | 322 | 406 | 497 | 678 |
| year 2 | 331 | 390 | 436 | 783 |
| year 4 | 319 | 392 | 491 | 716 |
| Σphenanthrene | ||||
| baseline | 165 | 209 | 218 | 389 |
| year 2 | 162 | 201 | 220 | 408 |
| year 4 | 161 | 199 | 242 | 379 |
| 1-hydroxypyrene | ||||
| baseline | 84.8 | 107 | 138 | 190 |
| year 2 | 81.9 | 116 | 129 | 195 |
| year 4 | 85.1 | 116 | 130 | 186 |
Bold text denotes non-monotonic increase in four-year geometric mean across quartiles.
Abbreviations: Q quartile.