Table 4.
Odds ratios (with 95% CI) of hospital visits for pneumonia associated with atmospheric pollutants
| Air pollutants | OR (95%CI) | ||||||
|---|---|---|---|---|---|---|---|
| lag0 | lag1 | lag2 | lag3 | lag4 | lag5 | lag6 | |
| PM2.5 | 1.015 | 1.048* | 1.064** | 1.008 | 1.028 | 1.059** | 1.026 |
| (0.974,1.056) | (1.007,1.091) | (1.023,1.107) | (0.968,1.050) | (0.989,1.069) | (1.019,1.102) | (0.985,1.068) | |
| PM10 | 1.029 | 1.052* | 1.077*** | 1.018 | 1.04 | 1.046* | 1.005 |
| (0.986,1.074) | (1.008,1.098) | (1.032,1.124) | (0.975,1.063) | (0.997,1.085) | (1.002,1.091) | (0.961,1.050) | |
| SO2 | 0.991 | 1.045 | 1.072* | 1.01 | 1.002 | 1.008 | 1.016 |
| (0.934,1.051) | (0.985,1.109) | (1.011,1.135) | (0.953,1.071) | (0.945,1.062) | (0.950,1.069) | (0.958,1.077) | |
| NO2 | 1.005 | 1.047 | 1.067** | 1.027 | 1.018 | 1.007 | 1.018 |
| (0.950,1.064) | (0.990,1.107) | (1.010,1.127) | (0.971,1.085) | (0.963,1.076) | (0.953,1.065) | (0.962,1.078) | |
| CO | 1.004 | 1.014 | 1.03 | 1.007 | 1.015 | 1.032 | 1.025 |
| (0.966,1.043) | (0.979,1.051) | (0.994,1.066) | (0.972,1.043) | (0.982,1.049) | (0.999,1.066) | (0.990,1.062) | |
Note: All conditional logistic models were adjusted for temperature, relative humidity, and atmospheric pressure. The concentration of each pollutant increases in interquartile intervals
Lag represents the days before the hospital visits. lag0 represents the day of the hospital visits; Lag1 represents one day before hospital visits; the others so on
*P < 0.05; ** P < 0.01; *** P < 0.001