TABLE 4.
Frequencies of Detections for Organophosphorus Insecticide, Pyrethroid Insecticide, and Herbicide Urinary Metabolites for All Samples and for Four Periods of the Agricultural Season for Farmworkers in eastern North Carolina, 2007
| All (n = 939) |
Period | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Metabolites | 5/1–6/8 (n = 250) |
6/9–7/7 (n = 233) |
7/8–8/5 (n = 229) |
8/6–l9/4 (n = 227) |
||||||
| n | % | n | % | n | % | n | % | n | % | |
| Organophosphorus Insecticide Urinary Metabolites |
||||||||||
| TCPy | 434 | 46.2 | 50 | 20.0 | 113 | 48.5 | 136 | 59.4 | 135 | 59.5 |
| CMHC | 31 | 3.3 | 6 | 2.4 | 3 | 1.3 | 13 | 5.7 | 9 | 4.0 |
| IMPY | 32 | 3.4 | 10 | 4.0 | 4 | 1.7 | 1 | 0.4 | 17 | 7.5 |
| CIT | 9 | 0.9 | 3 | 1.2 | 0 | 6 | 2.6 | 0 | ||
| MDA | 260 | 27.7 | 38 | 15.2 | 93 | 39.9 | 74 | 32.3 | 55 | 24.2 |
| PNP | 915 | 97.4 | 243 | 97.2 | 227 | 97.4 | 220 | 96.1 | 225 | 99.1 |
| DEAMPY | 56 | 6.0 | 18 | 7.2 | 12 | 5.1 | 4 | 1.7 | 22 | 9.7 |
| Pyrethroid Insecticide Urinary Metabolites |
||||||||||
| 4F3PBA | 3 | 0.3 | 1 | 0.4 | 1 | 0.4 | 0 | 1 | 0.4 | |
| DBCA | 2 | 0.2 | 1 | 0.4 | 1 | 0.4 | 0 | 0 | ||
| CCC | 2 | 0.2 | 1 | 0.4 | 0 | 1 | 0.4 | 0 | ||
| CDCA | 22 | 2.3 | 1 | 0.4 | 18 | 7.7 | 2 | 0.9 | 1 | 0.4 |
| 3PBA | 530 | 56.4 | 127 | 50.8 | 104 | 44.6 | 138 | 60.2 | 161 | 70.9 |
| TCC | 26 | 2.8 | 3 | 1.2 | 1 | 0.4 | 11 | 4.8 | 11 | 4.8 |
| Herbicide Urinary Metabolites |
||||||||||
| 2,4-D | 639 | 68.1 | 175 | 70.0 | 134 | 57.5 | 160 | 69.9 | 170 | 74.9 |
| 2,4,5-T | 7 | 0.7 | 1 | 0.4 | 0 | 5 | 2.2 | 1 | 0.4 | |
| ACE | 274 | 29.2 | 6 | 2.4 | 6 | 2.6 | 113 | 49.3 | 149 | 65.6 |
| ALA | 0 | 0 | 0 | 0 | 0 | |||||
| ATZ | 11 | 1.2 | 3 | 1.2 | 1 | 0.4 | 4 | 1.7 | 3 | 1.3 |
| MET | 159 | 16.9 | 33 | 13.2 | 12 | 5.2 | 60 | 26.2 | 54 | 23.8 |