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Occup Environ Med 59:294-299 doi:10.1136/oem.59.5.294
  • Original article

Effects of air pollution on general practitioner consultations for upper respiratory diseases in London

Table 3

Selected results of two pollutant analyses, URD (excluding allergic rhinitis)

% Change in number of consultations for 10–90th percentile change in pollutant (95% CI)
Pollutant NO2 O3 SO2 PM10
The diagonal elements give the most significant single pollutant model results (bold) and the off diagonal elements the results for the row pollutant in the presence of the column pollutant.
Children:
    NO2 mean 2.0 (−0.3 to 4.3) 1.7 (−0.6 to 3.9) 2.2 (−0.4 to 5.0) 1.5 (−1.7 to 4.8)
    O3 8 h maximum −4.6 (−7.2 to −1.9) −3.6 (−6.3 to −0.8) −4.4 (−7.1 to −1.6) −4.6 (−7.1 to −2.0)
    SO2 mean 4.7 (2.2 to 7.4) 1.0 (−2.2 to 4.2) 3.5 (1.4 to 5.8) 4.6 (2.1 to 7.2)
    PM10 mean 3.8 (1.6 to 6.1) 1.8 (−0.4 to 3.9) 2.0 (−0.6 to 4.6) 2.0 (−0.2 to 4.2)
Adults:
    NO2 mean 5.1 (2.0 to 8.3) 4.4 (2.2 to 6.8) 4.4 (1.6 to 7.2) 2.7 (−0.5 to 5.9)
    O3 8 h maximum −4.1 (−6.6 to −1.6) −5.3 (−8.4 to −2.0) −3.9 (−6.2 to −1.5) −4.0 (−6.4 to −1.6)
    SO2 mean 2.6 (−0.0 to 5.2) 3.7 (0.6 to 7.0) 3.5 (0.5 to 6.5) 2.4 (−0.1 to 5.0)
    PM10 mean 2.8 (0.7 to 4.9) 4.8 (2.6 to 7.0) 4.8 (2.2 to 7.5) 5.7 (2.9 to 8.6)
Elderly:
    NO2 mean 8.7 (3.8 to 13.8) 8.1 (3.0 to 13.6) 8.6 (2.1 to 15.4) 4.3 (−2.8 to 11.8)
    O3 8 h maximum −6.4 (−11.8 to −0.6) −8.3 (−13.3 to −3.0) −6.6 (−11.5 to −1.4) −7.2 (−12.3 to −1.8)
    SO2 mean 4.3 (−1.2 to 10.2) 9.0 (1.7 to 16.9) 4.6 (0.4 to 9.0) 3.2 (−1.9 to 8.7)
    PM10 mean 4.6 (0.5 to 8.8) 10.7 (5.7 to 16.0) 10.6 (4.5 to 17.1) 10.2 (5.3 to 15.3)

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