Table 3.
Mean (± SD) urinary concentrations and variability of MEHHP for each study participant.a
| Mean MEHHP (μg/g creatinine) |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Spot collections (including first morning void) |
Days 1–7 |
|||||||||
| Participant | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday | Spot samples | First morning void | 24-hr |
| P1 | 324.0 ± 296.1 | 163.4 ± 85.2 | 130.7 ± 162.2 | 373.2 ± 344.3 | 55.5 ± 54.3 | 24.4 ± 13.6 | 39.0 ± 52.6 | 158.0 ± 224.4 | 81.1 ± 56.7 | 139.9 ± 96.5 |
| P2 | 26.6 ± 10.0 | 635.0 ± 730.9 | 67.6 ± 24.5 | 40.4 ± 26.6 | 33.8 ± 20.4 | 28.9 ± 12.6 | 126.5 ± 147.7 | 125.4 ± 329.8 | 47.7 ± 32.5 | 129.8 ± 139.7 |
| P3 | 26.9 ± 19.9 | 273.4 ± 356.4 | 215.1 ± 235.6 | 473.5 ± 692.7 | 343.8 ± 415.3 | 66.5 ± 78.8 | 137.4 ± 123.1 | 218.5 ± 265.5 | 88.3 ± 116.7 | 182.2 ± 119.8 |
| P4 | 16.5 ± 8.0 | 23.7 ± 16.6 | 20.1 ± 10.1 | 20.5 ± 8.6 | 18.7 ± 13.2 | 12.3 ± 6.4 | 136.5 ± 124.3 | 40.3 ± 68.9 | 15.2 ± 3.4 | 31.1 ± 32.9 |
| P5 | 14.7 ± 5.9 | 12.9 ± 13.2 | 34.4 ± 20.3 | 25.2 ± 15.5 | 14.2 ± 10.8 | 18.5 ± 6.3 | 15.3 ± 12.9 | 19.0 ± 14.1 | 34.1 ± 9.3 | 24.0 ± 6.1 |
| P6 | 95.7 ± 67.9 | 40.5 ± 14.0 | 33.5 ± 19.9 | 20.9 ± 6.9 | 19.8 ± 7.5 | 10.8 ± 6.2 | 25.3 ± 16.5 | 35.8 ± 37.1 | 30.1 ± 17.8 | 34.2 ± 24.0 |
| P7 | 109.4 ± 118.0 | 26.7 ± 13.7 | 19.0 ± 5.4 | 19.1 ± 18.3 | 706.3 ± 603.4 | 107.0 ± 149.9 | 30.4 ± 29.8 | 109.0 ± 244.1 | 22.7 ± 8.2 | 143.6 ± 225.3 |
| P8 | 8.3 ± 5.3 | 122.6 ± 131.6 | 337.8 ± 328.6 | 188.8 ± 137.0 | 243.7 ± 207.6 | 73.1 ± 61.4 | 16.7 ± 6.5 | 133.0 ± 187.2 | 60.5 ± 52.1 | 123.2 ± 105.0 |
a
The average intraperson CV of concentrations in the spot urine samples collected throughout the week was 161% and ranged from 74% (P5) to 263% (P2).