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Table 1 Summary statistics

From: Socioeconomic and urban-rural differentials in exposure to air pollution and mortality burden in England

  All areas Urban areas Rural areas
Residential postcodes: n (%) 1,202,578 886,683 315,895
(100%) (74%) (26%)
LSOA: n (%) 32,179 26,632 5557
(100%) (83%) (17%)
Population in mid-2006: n (%) 52,122,136 43,140,763 8,981,373
(100%) (83%) (17%)
2010 annual mean concentration (arithmetic mean), μg/m3: mean (sd)
Total PM2.5 9.21 (0.71) 9.32 (0.66) 8.89 (0.75)
Nitrate PM2.5 1.91 (0.25) 1.90 (0.23) 1.95 (0.31)
Sulphate PM2.5 1.49 (0.17) 1.51 (0.17) 1.42 (0.17)
Primary PM2.5 1.44 (0.39) 1.55 (0.37) 1.12 (0.27)
PM2.5–10 7.98 (0.63) 7.97 (0.53) 8.01 (0.84)
PM10 17.19 (0.92) 17.29 (0.86) 16.89 (1.01)
O3 68.46 (3.54) 67.66 (3.47) 70.69 (2.68)
2010 annual mean concentration (population-weighted mean), μg/m3
Total PM2.5 9.30 9.37 8.95
Nitrate PM2.5 1.91 1.90 1.97
Sulphate PM2.5 1.50 1.51 1.44
Primary PM2.5 1.51 1.58 1.15
PM2.5–10 7.96 7.96 7.97
PM10 17.26 17.33 16.92
O3 68.04 67.53 70.46