Table 3.
Exposure description and correlation matrix of air pollutants at the local authority level (N = 391 local authorities)
Pearson’s correlation coefficient | ||||||||
---|---|---|---|---|---|---|---|---|
NO2 (µg/m3) | SO2 (µg/m3) | PM10 (µg/m3) | PM2.5 (µg/m3) | Mean | SD | Median | Interquartile range | |
NO2 (µg/m3) | 1.00 | 12.99 | 7.08 | 11.71 | 8.18 | |||
SO2 (µg/m3) | 0.50 | 1.00 | 1.57 | 0.93 | 1.37 | 0.90 | ||
PM10 (µg/m3) | 0.77 | 0.38 | 1.00 | 14.06 | 3.19 | 14.43 | 4.26 | |
PM2.5 (µg/m3) | 0.81 | 0.42 | 0.97 | 1.00 | 9.42 | 2.35 | 9.62 | 3.23 |
Strong correlations with correlation coefficient ≥ 0.70 are highlighted in bold