Exposure Characteristics
Characteristics by Gender and Work Status of GuLF STUDY Participants at Enrollment, Home Visit, Follow-Up, and Clinical Exam Events
| Exposure Characteristic | Full Cohort N = 24,937 |
Home Visit N = 8,968 |
||
|---|---|---|---|---|
| N | % | N | % | |
| Work Affiliation | ||||
| BP contractor | 17,030 | 68.3 | 7,494 | 83.6 |
| BP employee | 622 | 2.5 | 232 | 2.6 |
| Federal government | 4,363 | 17.5 | 352 | 3.9 |
| Local or State government | 635 | 2.6 | 207 | 2.3 |
| Volunteer | 384 | 1.5 | 180 | 2 |
| Other | 1,029 | 4.1 | 385 | 4.3 |
| Don't know/Refused | 874 | 3.5 | 118 | 1.3 |
| Number of Jobs/Tasks | ||||
| 1 | 4,965 | 19.9 | 913 | 10.2 |
| 2-5 | 6,295 | 25.2 | 1,719 | 19.2 |
| 6-10 | 5,863 | 23.5 | 2,428 | 27.1 |
| 11 or more | 7,814 | 31.3 | 3,908 | 43.6 |
| Duration of Work | ||||
| 14 Days or Less | 1,463 | 5.9 | 445 | 5 |
| 15-180 Days | 18,122 | 72.7 | 6,278 | 70 |
| More than 180 Days | 5,352 | 21.5 | 2,245 | 25 |
| Work Timinga | ||||
| Only Before Capping | 4,194 | 16.8 | 1,338 | 14.9 |
| Only After Capping | 3,355 | 13.5 | 1,043 | 11.6 |
| Before and After Capping | 17,388 | 69.7 | 6,587 | 73.5 |
| Still Working at Time of Interview | 650 | 2.6 | 246 | 2.7 |
| Job Classb | ||||
| Response | 4,479 | 18 | 1,680 | 18.7 |
| Support of Operations | 4,371 | 17.5 | 1,888 | 21.1 |
| Clean-up on Water | 4,328 | 17.4 | 1,319 | 14.7 |
| Decontamination | 3,561 | 14.3 | 1,794 | 20 |
| Clean-up on Land | 3,634 | 14.6 | 1,462 | 16.3 |
| Administrative Support | 4,564 | 18.3 | 825 | 9.2 |
| Potentially Exposed to Dispersantsc | ||||
| Yes | 2,355 | 9.4 | 1,156 | 12.9 |
| No | 21,138 | 84.8 | 7,417 | 82.7 |
| Unknown | 1,444 | 5.8 | 395 | 4.4 |
| Potentially Exposed to Burning/Flaring (all participants) | ||||
| Yes | 2,400 | 9.6 | 823 | 9.2 |
| No | 22,032 | 88.4 | 7,975 | 88.9 |
| Unknown | 505 | 2 | 170 | 1.9 |
| Burning/Flaring Level (non-Vietnamese speaking participants)c | ||||
| None | 21,734 | 89.2 | 7,975 | 88.9 |
| Low | 54 | 0.2 | 18 | 0.2 |
| Medium | 1,844 | 7.6 | 709 | 7.9 |
| High | 238 | 1 | 96 | 1.1 |
| Unknown | 505 | 2.1 | 170 | 1.9 |
| Daily Maximum THC Ordinal Leveld | ||||
| THC <= 0.29 ppm | 5,458 | 21.9 | 1,264 | 14.1 |
| THC 0.3 - 0.9 ppm | 8,216 | 32.9 | 3,348 | 37.3 |
| THC 1.0 - 2.99 ppm | 7,791 | 31.2 | 3,014 | 33.6 |
| THC >= 3 ppm | 3,445 | 13.8 | 1,331 | 14.8 |
| Unknowne | 27 | 0.1 | 11 | 0.1 |
aWork relative to initial capping of well on July 15, 2010.
bSome people reported jobs or tasks in more than one job-class. Assignments shown are hierarchical in the same order as listed.
cNot assessed for Vietnamese-only speaking participants (N = 562 workers)
dDaily Maximum Ordinal THC Level is the daily maximum THC in ppm across all jobs across all time periods.
eExposure levels for those who began work after 06/30/2011 not estimated.