Table 3 Association between the number of days of excessive particulate matter 10 (PM10) and carbon monoxide (CO) in the winter of 2015 and concentration of putative contaminant sources
CO | PM10 | |||
|---|---|---|---|---|
exp(β) | 95% CI | exp(β) | 95% CI | |
Population density (person/km2)a | ||||
Q1(lowest) | 1.00 | 1.00 | ||
Q2 | 3.44 | 1.96–6.04 | 3.00 | 1.46–6.17 |
Q3 | 5.07 | 3.00–8.58 | 3.89 | 1.97–7.68 |
Q4(highest) | 3.70 | 2.19–6.26 | 1.59* | 0.79–3.18 |
No. of car registrationsb | ||||
Q1(lowest) | 1.00 | 1.00 | ||
Q2 | 3.53 | 1.96–6.38 | 1.50 | 0.70–3.21 |
Q3 | 3.86 | 2.22–6.72 | 1.45* | 0.71–2.95 |
Q4(highest) | 5.75 | 3.32–9.99 | 2.49 | 1.23–5.04 |
No. of car accidentc | ||||
Q1(lowest) | 1.00 | 1.00 | ||
Q2 | 2.20 | 1.23–3.93 | 1.00 | 0.47–2.13 |
Q3 | 3.14 | 1.84–5.36 | 1.67* | 0.84–3.32 |
Q4(highest) | 4.33 | 2.54–7.38 | 2.23 | 1.13–4.40 |
Industrial power usage (Kwh/ km2)d | ||||
Q1(lowest) | 1.00 | 1.00 | ||
Q2 | 2.88 | 1.64–5.07 | 2.69 | 1.31–5.52 |
Q3 | 3.93 | 2.37–6.51 | 3.19 | 1.66–6.12 |
Q4(highest) | 3.46 | 2.09–5.71 | 1.70* | 0.88–3.27 |
Generation of electricity (Kwh) | ||||
No | 1.00 | 1.00 | ||
Yes | 1.37 | 1.01–1.86 | 2.27 | 1.60–3.21 |