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Table 4 Coefficients with standard error and p-value for the different mixed models explaining the time trend of the urinary concentrations of water-soluble reduced species (log corrected).

From: Biomarkers of oxidative stress and its association with the urinary reducing capacity in bus maintenance workers

 

Smoker

Respiratory problems

Between-daya

Within day

Constant

OC

NOx

Cu

Model A1: No exposure

Coefficient

0.30 ± 0.17

0.35 ± 0.20

0.35 ± 0.10

0.17 ± 0.09

6.5 ± 0.11

-

-

-

p

0.081

0.080

0.001

0.060

< 0.001

-

-

-

Model A2: including stationary OC

Coefficient

0.31 ± 0.18

0.39 ± 0.21

0.33 ± 0.10

-0.22 ± 0.38

6.7 ± 0.41

0.01 ± 0.01

-

-

p

0.082

0.060

0.002

0.563

< 0.001

0.293

-

-

Model A3: including stationary NOx

Coefficient

0.40 ± 0.20

0.37 ± 0.22

0.37 ± 0.11

-0.14 ± 0.26

6.6 ± 0.28

-

5.8.10-4 ± 3.6. 10-4

-

p

0.044

0.093

0.001

0.596

< 0.001

-

0.112

-

Model A4: including stationary Cu

Coefficient

0.36 ± 0.18

0.34 ± 0.20

0.38 ± 0.10

0.04 ± 0.11

6.4 ± 0.18

-

-

1.5.10-3 ± 0.9. 10-3

p

0.045

0.090

< 0.001

0.760

< 0.001

-

-

0.093

  1. a: restricted to non-smokers