. 2019 Jan 29;188(5):917–927. doi: 10.1093/aje/kwz017

Table 6.

Risk of Self-Reported Myocardial Infarction/Fatal Coronary Heart Disease According to Median Total Hydrocarbon Exposure and Time Since Initiating Oil Spill Work (n = 22,550), Gulf Long-Term Follow-up Study, United States, 2010–2016

Median THC Exposure, ppm	Time Since Initiating Oil Spill Work
	12 Months		24 Months		36 Months		48 Months
	Risk^a	RD	Risk^a	RD	Risk^a	RD	Risk^a	RD
<0.10	0.003	Referent	0.006	Referent	0.009	Referent	0.010	Referent
0.10–0.29	0.004	0.001	0.009	0.003	0.012	0.003	0.017	0.007
0.30–0.99	0.004	0.001	0.008	0.002	0.011	0.002	0.015	0.005
≥1.00	0.006	0.003	0.009	0.003	0.014	0.005	0.017	0.006

Abbreviations: ppm, parts per million; RD, risk difference; THC, total hydrocarbons.

^a Risk estimates accounted for confounders (age, sex, education, smoking, and residential proximity to the spill) and predictors of censoring (age, education, ethnicity, smoking, cleanup work duration, and residential proximity to the spill) using inverse-probability weights.