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Table 2 Means, standard deviations (SD) and quartiles of daily pollutant concentrations and meteorological variables for the whole area of Lambeth, 2009–13 (temporal variability) and for daily pollutant concentrations, per LSOA in Lambeth (177 LSOAs), for 2009–13 (spatial variability)

From: Spatio-temporal associations of air pollutant concentrations, GP respiratory consultations and respiratory inhaler prescriptions: a 5-year study of primary care in the borough of Lambeth, South London

  Temporal variability Spatial variability
Mean (SD) 1st Quartile 2nd Quartile 3rd Quartile IQRa Mean (SD) 1st Quartile 2nd Quartile 3rd Quartile IQRa
24 h NO2(μg/m3) 50.7 (15.4) 39.1 49.7 61.4 22.3 48.4 (16.3) 36.6 45.1 57.6 21.0
24 h PM10(μg/m3) 21.2 (8.8) 15.2 18.6 24.3 9.1 20.8 (2.6) 19.2 20.3 21.1 1.9
24 h PM2.5(μg/m3) 15.6 (8.2) 10.3 12.8 17.9 7.6 15.4 (1.2) 14.5 15.0 16.0 1.5
8 h O3 (μg/m3) 49.9 (18.5) 37.6 50.2 61.9 24.3 50.7 (4.7) 48.8 52.0 54.3 5.5
24 h temperature (°C) 11.0 (5.7) 7.0 11.3 15.3       
24 h relative humidity (%) 77.2 (10.1) 70.1 77.8 85.1       
  1. aIQR interquartile range