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Table 4 Percent change and 95% confidence intervals in biomarker levels associated with each IQR increase in daily exposure levels a

From: Traffic-related exposures and biomarkers of systemic inflammation, endothelial activation and oxidative stress: a panel study in the US trucking industry

Exposureb

IQR

ICAM-1

VCAM-1

IL-6

CRP

8-OHdG

PM2.5

6.11

-1.1 (-3.7, 1.5)

-1.8 (-4.2, 0.7)

2.2 (-7.6, 13.0)

-0.2 (-13.1, 14.8)

8.9 (-6.5, 26.5)

EC

0.56

0.1 (-2.5, 2.8)

-0.3 (-2.8, 2.3)

-7.1 (-14.6, 1.0)

-5.3 (-13.7, 4.0)

4.9 (-9.3, 21.3)

OC

3.97

-1.1 (-4.4, 2.2)

-1.1 (-4.3, 2.1)

12.2 (-0.4, 25.8)

1.2 (-14.7, 20.0)

-3.1 (-18.7, 15.4)

  1. Notes: aLinear mixed effect models for repeated measures using only the 2 post-shift measurements per participant, with random intercepts for each individual and adjusting for age, BMI, physical activity, hypertension, chronic disease, SHS exposure and in the case of inflammation and endothelial activation markers time varying medication use.
  2. bPollutant models with daily exposure values as the exposure of interest, with each pollutant modelled separately.