TABLE 2

Summary of air pollution indicators

Traffic-related air pollution
 Distance to road km0.4 (0.5)
 Road length (within 1 km buffer zone) km2.1 (2.1)
 Road length (within 500 m buffer zone) km0.8 (1)
Ambient air pollution
 Mean annual concentrations for PM2.5 and NO2
  PM2.5 μg·m−313.7 (2.8)
  NO2 μg·m−326 (10.1)
 Nearest monitor (<50 km) approach for PM2.5 and NO2 at the time of baseline right heart catheterisation
  PM2.5 μg·m−3
   Lag 0 days#9.4 (7.9)
   Lag 3 days#9.3 (7.5)
   Lag 7 days#10.2 (7.1)
   Lag 14 days#10.6 (8)
  NO2 μg·m−3
   Lag 0 days#29.3 (30.2)
   Lag 3 days#27.3 (28)
   Lag 7 days#28.3 (30.2)
   Lag 14 days#29.2 (27.4)

Data are presented as median (interquartile range). PM2.5: particulate matter with a 50% cut-off aerodynamic diameter ≤2.5 μm; NO2: nitrogen dioxide. #: cumulative air pollution concentrations at lags of 0, 3, 7 and 14 days preceding the date of diagnosis.