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Table 4 Estimated difference in exhaled breath temperature (°C) associated with an 100% increase in distance and an interquartile range increase in traffic density

From: Host and environmental predictors of exhaled breath temperature in the elderly

Exposure (exposure contrasts) Adjusted regression coefficients* 95% CI P-value
Distance: freeway, +100% -0.23°C -0.42 to -0.03 0.028
Distance major road, +100% -0.18°C -0.35 to -0.001 0.050
Distance major intense road, +100% -0.17°C -0.33 to -0.01 0.036
Traffic density: 200-m buffer, +2 562 vehicles*km/day 0.13°C -0.04 to 0.30 0.14
Traffic density: 300-m buffer, + 5 174 vehicles*km/day 0.14°C -0.02 to 0.31 0.084
Traffic density: 500-m buffer, + 21 775 vehicles*km/day 0.37°C 0.06 to 0.68 0.021
Traffic density: 1000-m buffer, + 57 628 vehicles*km/day 0.21°C -0.16 to 0.59 0.26
  1. *Adjusted for gender, age, physical activity, BMI, and daily average ambient temperature as identified in Table 3 in addition asthma and COPD were forced in the regression models.