Table 1

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

Adjusted R20.82
L1OCV R20.68
VariableParameter estimateSEp ValueVIF
Addresses in a 300 m buffer0.0043970.0017340.01692.02
Addresses in a 300–5000 m buffer0.000057570.000021600.01242.60
Roads of BASNET categories 1–3 in a 250 buffer0.67300.1476<0.00011.22
Region West*7.6562.0530.00082.07
Region Middle*8.2182.0150.00031.64
  • * Region North is the reference region.

  • VIF, Variance Inflation Factor; L1OCV R2, the R2-value resulting from leave-one-out cross validation; TRACHEA, Traffic Related Air pollution and Children's respiratory HEalth and Allergies study; TRAPCA, Traffic Related Air Pollution and Children's Asthma study.