Variables | Univariable analysis | Multivariable conditional regression | ||
Crude OR (95% CI) | P value | Adjusted OR (95% CI) | P value | |
Age | 1.003 (0.997 to 1.009) | 0.37 | – | – |
Sex | 1.000 (0.807 to 1.239) | 1.00 | – | – |
Season | 1.000 (0.784 to 1.276) | 1.00 | – | – |
ACO | 5.121 (3.830 to 6.846) | <0.001 | 4.542 (3.376 to 6.11) | <0.001 |
CCI ≥3 | 2.565 (2.042 to 3.222) | <0.001 | 2.198 (1.729 to 2.794) | <0.001 |
PM2.5 | 1.006 (1.000 to 1.012) | 0.057 | 0.999 (0.991 to 1.006) | 0.754 |
O3 (8-hour maximum) | 1.007 (1.001 to 1.013) | 0.020 | 1.009 (1.001 to 1.016) | 0.025 |
ACO, asthma COPD (chronic obstructive pulmonary disease) overlap; CCI, Charlson Comorbidity Index; O3, ozone; PM2.5, particulate matter <2.5 µm.