Table 2

Land use regression model for NO2 in TRACHEA 1999–2000, based on 35 sites, used in both TRAPCA 1999–2000 and TRACHEA 2007

Adjusted R20.84
R20.86
L1OCV R20.80
RMSE4.21
VariableParameter estimateSEp ValueVIF
Intercept12.721.52<0.0001
Population in a 5000 m buffer0.000030770.000009100.00202.63
Traffic intensity on the nearest road0.00080900.0001535<0.00011.73
Region West*7.9312.1930.00112.36
Region Middle*7.1781.9540.00091.54
  • * Region North is the reference region.

  • TRACHEA, Traffic Related Air pollution and Children's respiratory HEalth and Allergies study; TRAPCA, Traffic Related Air Pollution and Children's Asthma study.