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Joint effects of BTEX-H mixture on asthma risk among GuLF Study workers (N=19,018)
| BTEX-H Mixture (ppb-days) | Risk Ratio (95% CI)a |
|---|---|
| Quartile 1 | Referent |
| Quartile 2 | 1.45(1.36,1.54) |
| Quartile 3 | 2.10(1.86,2.38) |
| Quartile 4 | 3.05(2.53,3.67) |
| Overall average per quartile increase | 1.45(1.35,1.55) |
Adjusted for age, gender, race, ethnicity, smoking, pack-years, previous oil spill cleanup work, previous oil industry experience, highest educational attainment
