Table 5.
Reliability analysis for specific gravity-corrected urine specimens from MARBLES Study participants 2007–2014.
| Truea (average) | Kappab (95% CI) | ||||
|---|---|---|---|---|---|
| 3- PBA | Observedc | Low | Medium | High | |
| Subsample (N = 9) | |||||
| All specimensd | Low | 15 | 6 | 8 | 0.24 (0.04, 0.44) |
| Medium | 9 | 8 | 13 | ||
| High | 5 | 11 | 13 | ||
| Standard sample (N = 157) | |||||
| All specimense | Low | 85 | 34 | 27 | 0.47 (0.39, 0.54) |
| Medium | 54 | 59 | 34 | ||
| High | 7 | 55 | 85 | ||
| FMV | Low | 45 | 26 | 19 | 0.36 (0.25, 0.47) |
| Medium | 29 | 28 | 21 | ||
| High | 6 | 30 | 39 | ||
| Pooled specimens | Low | 40 | 8 | 8 | 0.59 (0.49, 0.69) |
| Medium | 25 | 31 | 13 | ||
| High | 1 | 25 | 46 | ||
| TCPy | |||||
| Subsample (N = 9) | |||||
| All specimensd | Low | 13 | 10 | 6 | 0.27 (0.07, 0.47) |
| Medium | 11 | 10 | 9 | ||
| High | 6 | 8 | 15 | ||
| Standard sample (N = 157) | |||||
| All specimense | Low | 86 | 37 | 23 | 0.54 (0.47, 0.61) |
| Medium | 49 | 63 | 34 | ||
| High | 5 | 42 | 101 | ||
| FMV | Low | 40 | 26 | 17 | 0.43 (0.33, 0.54) |
| Medium | 28 | 30 | 20 | ||
| High | 5 | 25 | 52 | ||
| Pooled specimens | Low | 46 | 11 | 6 | 0.67 (0.59, 0.76) |
| Medium | 21 | 33 | 14 | ||
| High | 0 | 17 | 49 | ||
a
tertile classification based on average pesticide metabolite concentrations from urine specimens collected during pregnancy.
b
weighted Cohen’s kappa statistic.
c
tertile classification based on pesticide metabolite concentrations from a single urine specimen collected during pregnancy.
d
FMV and 24-h urine specimens.
e
FMV and pooled urine specimens, FMV = first morning void, CI = confidence interval, 3-PBA = 3-phenoxybenzoic acid, TCPy = 3,5,6-trichloro-2-pyridinol.