Table 2.
Gestational specific gravity-corrected OPE metabolite distribution in a nested case-control study of preschool ADHD in MoBa, 2004–2007.
| Exposure | Geometric Meana | Geometric SDa | Min | 25% | 50% | 75% | Max | LODb | %≥LODb | LOQc | %≥c |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DPhP (ng/mL) | 0.03 | 0.10 | |||||||||
| Preschool ADHD (N=260) | 0.48 | 2.95 | <LOD | 0.29 | 0.49 | 0.93 | 37.22 | 96.5% | 92.3% | ||
| Controlsd (N=549) | 0.46 | 2.93 | <LOD | 0.26 | 0.48 | 0.88 | 11.16 | 96.5% | 93.4% | ||
| DnBP (ng/mL) | 0.07 | 0.20 | |||||||||
| Preschool ADHD (N=260) | 0.26 | 2.18 | <LOD | 0.17 | 0.25 | 0.37 | 10.93 | 95.4% | 66.5% | ||
| Controlsd (N=549) | 0.25 | 2.36 | <LOD | 0.15 | 0.23 | 0.38 | 25.59 | 92.7% | 58.5% | ||
| BBOEP (ng/mL) | - | - | 0.07 | 0.20 | |||||||
| Preschool ADHD (N=260) | 0.08 | 2.01 | <LOD | <LOD | <LOD | 0.13 | 0.84 | 44.2% | 12.3% | ||
| Controlsd (N=549) | 0.09 | 2.13 | <LOD | <LOD | <LOD | 0.13 | 3.40 | 43.7% | 14.6% | ||
| BDCIPP (ng/mL) | 0.17 | 0.50 | |||||||||
| Preschool ADHD (N=260) | 0.17 | 2.40 | <LOD | <LOD | <LOD | <LOD | 16.83 | 20.4% | 10.8% | ||
| Controlsd (N=549) | 0.18 | 2.72 | <LOD | <LOD | <LOD | <LOD | 96.92 | 19.5% | 12.2% |
a
Values below the limit of detection (LOD) were imputed using for the geometric mean and standard deviation.
b
Limit of detection.
c
Limit of quantification.
d
Controls are birth-year-stratified to account for changes in exposure or outcome frequency attributable to birth year.