Table 4.

Distribution of Study Participants by Various Metrics¹

Metric	% of cohort (N=24,937)
OSRC class
Response	18.0
Support of Operations	17.5
Cleanup on Water	17.4
Decontamination	14.3
Cleanup on Land	14.6
Administrative Support	18.3
Maximum total hydrocarbon level
<0.03	0.0
0.03–0.09	13.8
0.1–0.29	8.3
0.3–0.99	33.6
1.00–2.99	30.9
3.0–9.99	9.0
>=10	4.4
Minimum total hydrocarbon level
<0.03	20.2
0.03–0.09	38.9
0.1–0.29	29.7
0.3–0.99	10.6
1.00–2.99	0.6
3.0–9.99	0.1
>=10	0.0
Median total hydrocarbon level
<0.03	0.2
0.03–0.09	14.9
0.1–0.29	31.9
0.3–0.99	47.5
1.00–2.99	5.1
3.0–9.99	0.4
>=10	0.0
Mean total hydrocarbon level
<0.03	0.0
0.03–0.09	14.1
0.1–0.29	19.0
0.3–0.99	51.4
1.00–2.99	14.3
3.0–9.99	1.1
>=10	0.0
Potentially Exposed to Dispersants
No	84.8
Yes	9.4
Unknown	5.8
Potentially Exposed to Burning
None	89.2
Low	0.2
Medium	7.6
High	1.0
Unknown	2.1

¹Maximum=the highest THC exposure estimate experienced by each study participant across all EGs within and across all time periods was identified and then assigned to one of the ordinal categories. Minimum=the lowest THC exposure estimate experienced by each study participant across all EGs within and across all time periods was identified and then assigned to one of the ordinal categories. Median=the median of all exposure estimates across all EGs within and across all time periods experienced by each study participant was calculated and then assigned to one of the ordinal categories. Mean=the mean of all exposure estimates across all EGs within and across all time periods experienced by each study participant was calculated and then assigned to one of the ordinal categories