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Occup Environ Med 58:165-171 doi:10.1136/oem.58.3.165
  • Review

Exposure to benzene in urban workers: environmental and biological monitoring of traffic police in Rome

Table 7

Biomarkers of benzene exposure in urban workers: regression analyses

B7-150 SE R2 p Value
Variable7-151:
 Dependent variable: ln blood benzene (after shift):
 Constant7-153 5.057 0.084
 ln TWA benzene exposure 0.109 0.046 0.024 0.020
 Total 0.024 0.020
Variable7-152:
 Dependent variable: ln TMA (after shift):
 Constant7-153 4.457 0.146
 Smoke 0.512 0.146 0.065 0.001
 Sex −0.539 0.156 0.053 0.001
 Total 0.118 0.000
Variable7-152:
 Dependent variable: ln S-PMA (after shift):
 Constant7-153 −0.671 0.555
 ln blood benzene 0.293 0.102 0.038 0.005
 Smoke 0.265 0.093 0.042 0.005
 Sex −0.215 0.100 0.018 0.032
 Total 0.098 0.000

  • Stepwise regression analysis: for entry p=0.05.

  • ↵7-150 B=slope of the regression line.

  • ↵7-151 Variables considered: TWA benzene exposure, job (trafficv office police), smoking, sex, age.

  • ↵7-152 Variables considered: TWA benzene exposure, job, blood benzene, smoking, sex, age.

  • ↵7-153 Constant=estimated intercept value.

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