| Referents (n = 57) | Traffic officers (n = 77) |
---|
 | Mean | (95% CI) | Min/Max | Mean | (95% CI) | Min/Max |
---|
Benzene, μg/m3
| 13.0 | (8.2-17.9) | 2.0/115.1 | 31.8 | (22.6-40.9) | 9.0/315.7 |
Toluene, μg/m3
| 43.4 | (30.5-56.2) | 6.0/368.0 | 128.7 | (73.5-183.9) | 24.4/1710.7 |
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aAirborne benzene and toluene concentrations measured as a tracer of traffic exposure measured through a passive sampler worn near the breathing zone by each participant during work shift. Airborne benzene and toluene levels showed high correlation in this study population (r2 = 0.87)