Relative risk (with 95% CI) for the pollutants per 10 μg/m3 increase in the concentration of air pollutants for hospitalisations due to an acute exacerbation of COPD (single pollutant model)
Lag days | NO2 | PM10 | O3 (8 h) | SO2 | PM2.5 |
---|---|---|---|---|---|
SO2, sulphur dioxide; NO2, nitrogen dioxide; O3, ozone; PM10, PM2.5, particulates with an aerodynamic diameter <10 μm or <2.5 μm. | |||||
*p<0.05, **p<0.001. | |||||
†Highest χ2 score (best lag). | |||||
Lag 0 | 1.009 (1.005 to 1.013)** | 1.003 (1.000 to 1.005)* | 1.002 (0.998 to 1.005) | 1.007 (1.001 to 1.014)*† | 1.002 (0.998 to 1.001) |
Lag 1 | 1.001 (0.997 to 1.005) | 1.005 (1.002 to 1.007)** | 1.011 (1.008 to 1.015)** | 0.991 (0.981 to 1.001) | 1.003 (0.999 to 1.007)** |
Lag 2 | 1.003 (0.999 to 1.007) | 1.010 (1.007 to 1.012)** | 1.011 (1.008 to 1.020)** | 0.992 (0.985 to 1.000) | 1.011 (1.007 to 1.014)** |
Lag 3 | 1.010 (1.007 to 1.014)** | 1.011 (1.008 to 1.013)** | 1.011 (1.012 to 1.019)** | 1.006 (0.999 to 1.013) | 1.013 (1.010 to 1.017)** |
Lag 4 | 1.010 (1.007 to 1.014)** | 1.008 (1.006 to 1.011)** | 1.011 (1.008 to 1.015)** | 1.004 (0.998 to 1.011) | 1.011 (1.008 to 1.015)** |
Lag 5 | 1.008 (1.004 to 1.012)** | 1.007 (1.004 to 1.009)** | 1.006 (1.003 to 1.010)** | 1.004 (0.997 to 1.010) | 1.009 (1.006 to 1.013)** |
Lag 0–1 | 1.007 (1.003 to 1.011)** | 1.005 (1.002 to 1008)** | 1.011 (1.006 to 1.014)** | 0.998 (0.991 to 1.006) | 1.004 (0.999 to 1.008) |
Lag 0–2 | 1.009 (1.004 to 1.013)** | 1.011 (1.008 to 1.014)** | 1.019 (1.015 to 1.023)** | 0.993 (0.985 to 1.001) | 1.010 (1.006 to 1.015)** |
Lag 0–3 | 1.026 (1.022 to 1.031)**† | 1.016 (1.013 to 1.019)** | 1.027 (1.02 to 1.031)** | 0.998 (0.989 to 1.007) | 1.018 (1.013 to 1.022)** |
Lag 0–4 | 1.021 (1.017 to 1.026)** | 1.020 (1.017 to 1.024) | 1.031 (1.027 to 1.036)** | 1.001 (0.991 to 1.010) | 1.024 (1.019 to 1.029)** |
Lag 0–5 | 1.026 (1.022 to 1.031)** | 1.024 (1.021 to 1.028)**† | 1.034 (1.030 to 1.040)**† | 1.004 (0.994 to 1.014) | 1.031 (1.026 to 1.036)**† |