Table 5

Significant predictors of benzene concentrations in post-exposure breath of fuel maintenance workers

EffectnEstimateSEp value
AIR, concentration of benzene in air; PREBREATH, concentration of benzene in pre-exposure breath; TRAVELTIME, time lag between end of exposure and breath sampling; EXERTION, ordinal level of physical activity (0–24); SMOKED, smoked cigarette(s) on the day of sampling; RESPIRATOR, used a respirator; IRRITATION, reported skin irritation.
Intercept1081.3190.323<0.0001
AIR ln(µg/m3)1080.2990.041<0.0001
PREBREATH ln(µg/m3)1080.2890.0820.0006
TRAVELTIME (min)108−0.0140.0040.0009
EXERTION1080.0310.0140.0322
SMOKED0.0144
    Yes 23 0.385 0.155 0.0144
    No 85 0
RESPIRATOR0.0037
    Yes 96 −0.605 0.204 0.0037
    No 12 0
IRRITATION0.0245
    Yes 57 0.324 0.142 0.0245
    No 51 0