| Dependent variables (0, no symptom; 1, having symptom) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
 | Symptom 1 | Symptom 2 | Symptom 3 | Symptom 4 | Symptom 5 | |||||
Independent variables | OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI |
Kumamoto | ||||||||||
 Hours spent outdoors (each 1 h) | 1.01 | 0.96–1.07 | 0.97 | 0.94–1.01 | 0.97 | 0.93–101 | 1.01 | 0.97–1.07 | 0.99 | 0.95–1.03 |
 Temperature (each 10 °C) | 0.93 | 0.79–1.09 | 1.05 | 0.97–1.14 | 0.98 | 0.89–1.07 | 0.92 | 0.79–1.06 | 0.95 | 0.88–1.04 |
 Relative humidity (each 10%) | 0.78 | 0.67–0.90 | 0.95 | 0.89–1.02 | 0.94 | 0.73–0.96 | 0.84 | 0.73–0.96 | 0.86 | 0.79–0.93 |
 Carbon monoxide (each 10 ppb) | 1.00 | 0.99–1.01 | 1.00 | 1.00–1.00 | 1.00 | 1.00–1.01 | 1.00 | 1.00–1.01 | 1.00 | 1.00–1.01 |
 Nitrogen dioxide (each 10 ppb) | 1.08 | 0.83–1.44 | 1.01 | 0.87–1.17 | 1.15 | 0.97–1.37 | 1.18 | 0.93–1.49 | 1.12 | 0.94–1.31 |
 Oxidants (each 10 ppb) | 1.16 | 1.06–1.27 | 1.06 | 1.01–1.12 | 1.03 | 0.98–1.09 | 1.10 | 1.02–1.20 | 1.10 | 1.04–1.16 |
 Sulfur dioxide (each 10 ppb) | 0.65 | 0.21–2.00 | 0.34 | 0.17–0.67 | 0.57 | 0.24–1.33 | 0.61 | 0.16–2.22 | 1.45 | 0.71–2.97 |
 SPM (each 10 μg/m3) | 1.17 | 1.02–1.34 | 1.10 | 1.02–1.20 | 1.08 | 0.99–1.18 | 1.07 | 0.95–1.21 | 1.15 | 1.06–1.26 |
 PM2.5 (each 10 μg/m3) | 1.17 | 1.03–1.33 | 1.17 | 1.03–1.33 | 1.10 | 0.96–1.27 | 1.18 | 0.94–1.49 | 1.32 | 1.15–1.52 |
 Asian sand dust event (each 1 event in last one month) | 1.11 | 1.05–1.17 | 1.03 | 1.00–1.05 | 0.99 | 0.96–1.02 | 1.03 | 0.98–1.09 | 1.03 | 1.00–1.07 |
Niigata | ||||||||||
 Hours spent outdoors (each 1 h) | 1.01 | 0.97–1.06 | 1.00 | 0.97–1.03 | 0.99 | 0.96–1.03 | 1.02 | 0.98–1.06 | 0.96 | 0.93–0.99 |
 Temperature (each 10 °C) | 0.98 | 0.84–1.14 | 0.93 | 0.87–1.00 | 1.04 | 0.95–1.14 | 0.98 | 0.85–1.12 | 1.02 | 0.94–1.09 |
 Relative humidity (each 10%) | 1.08 | 0.83–1.42 | 0.90 | 0.79–1.03 | 1.13 | 0.97–1.32 | 0.97 | 0.74–1.27 | 0.71 | 0.61–0.83 |
 Carbon monoxide (each 10 ppb) | 1.01 | 0.98–1.04 | 1.00 | 0.98–1.02 | 0.99 | 0.97–1.01 | 0.99 | 0.97–1.02 | 1.02 | 1.00–1.04 |
 Nitrogen dioxide (each 10 ppb) | 0.73 | 0.46–1.17 | 0.93 | 0.72–1.21 | 0.96 | 0.69–1.32 | 0.83 | 0.55–1.22 | 1.03 | 0.78–1.38 |
 Oxidants (each 10 ppb) | 0.96 | 0.87–1.06 | 1.02 | 0.97–1.07 | 0.98 | 0.92–1.04 | 1.03 | 0.94–1.14 | 1.14 | 1.07–1.21 |
 Sulfur dioxide (each 10 ppb) | 1.93 | 0.09–45.52 | 0.95 | 0.15–5.89 | 0.51 | 0.05–5.69 | 1.02 | 0.05–21.65 | 2.26 | 0.30–17.19 |
 SPM (each 10 μg/m3) | 0.96 | 0.78–1.18 | 0.93 | 0.83–1.04 | 0.97 | 0.84–1.12 | 0.93 | 0.77–1.12 | 1.16 | 1.02–1.32 |
 PM2.5 (each 10 μg/m3) | 0.90 | 0.63–1.31 | 0.94 | 0.77–1.15 | 0.94 | 0.72–1.23 | 0.95 | 0.66–1.36 | 1.20 | 0.96–1.49 |
 Asian sand dust event (each 1 event in last one month) | 0.98 | 0.87–1.11 | 0.98 | 0.92–1.04 | 1.01 | 0.93–1.09 | 1.08 | 0.97–1.19 | 1.10 | 1.03–1.18 |