Table 2

 Summary statistics of the daily counts of doctors’ house calls, daily concentrations of air pollutants and other environmental data (2000–3)

Variable (unit)Missing values (n)Mean (SD)MedianQ1–Q3MinimumMaximum
NO2, nitrogen dioxide; LRD, lower respiratory disease; URD, upper respiratory disease.
URD051.23 (31.31)4530–655276
LRD036.23 (30.42)2916–471262
Asthma05.49 (3.13)53–7021
NO2 (μg/m3)044.4 (14.92)43.633.7–53.212.3132.8
PM2.5 (μg/m3)7614.7 (7.34)12.99.5–18.23.069.6
PM10 (μg/m3)023.0 (9.87)21.016.2–27.76.397.3
Minimal temperature (°C)09.3 (5.53)9.49.4–13.5−7.425.7
Maximal temperature (°C)016.3 (7.42)16.016.0–21.5−4.939.3
Minimal humidity (%)053.3 (16.83)51.051–6617.094.0