表 4.
不同滞后天数O3max1h浓度每升高10 μg/m3儿童哮喘门诊就诊人次的超额危险度
Excess risk of childhood asthma hospital outpatient visits associated with a 10 μg/m3increase in O3max1h concentrations with different lag days %
| Lag days | ER (95%CI) | |||
| Spring | Summer | Autumn | Winter | |
| * P < 0.05. ER, excess risk. lag0 to lag7: single-day lagged model, lag0 refers to air pollution exposure of the current day, lag7 is exposure of the previous seventh day; lag01 to lag07: multi-day lagged model, lag01 represents the rolling two day average concentration of the current day and the day before, lag07 is the rolling eight-day average concentration of the current day and the previous seven days. | ||||
| Lag0 | 1.358 (0.126 to 2.606)* | 3.351 (1.231 to 5.516)* | 2.359 (1.052 to 3.683)* | 1.972 (0.484 to 3.482)* |
| Lag1 | 0.233 (-0.978 to 1.458) | -1.312 (-3.078 to 0.486) | -1.868 (-3.180 to 0.539) | -0.878 (-2.268 to 0.531) |
| Lag2 | -0.122 (-1.377 to 1.149) | -0.450 (-1.961 to 1.084) | -1.431 (-2.776 to 0.068) | 0.229 (-1.152 to 1.630) |
| Lag3 | -1.070 (-2.429 to 0.308) | 0.136 (-1.504 to 1.803) | -0.311 (-1.606 to 1.002) | -1.055 (-2.613 to 0.529) |
| Lag4 | -0.024 (-1.257 to 1.225) | -0.662 (-2.318 to 1.022) | 0.035 (-1.287 to 1.375) | 0.626 (-0.837 to 2.110) |
| Lag5 | 0.542 (-0.744 to 1.844) | 1.419 (-0.164 to 3.027) | -0.191 (-1.537 to 1.175) | -0.136 (-1.543 to 1.291) |
| Lag6 | 0.301 (-0.906 to 1.523) | 0.491 (-1.216 to 2.227) | -0.131 (-1.496 to 1.253) | -0.932 (-2.349 to 0.506) |
| Lag7 | 0.474 (-0.832 to 1.797) | -2.552 (-4.981 to 0.062) | -0.740 (-2.037 to 0.575) | 0.506 (-1.054 to 2.090) |
| Lag01 | 1.536 (-0.163 to 3.264) | 0.929 (-1.510 to 3.428) | -2.687 (-4.375 to 0.969) | 0.814 (-1.030 to 2.694) |
| Lag02 | 1.961 (-0.216 to 4.186) | 0.304 (-2.679 to 3.379) | -2.884 (-4.943 to 0.779) | 0.884 (-1.221 to 3.033) |
| Lag03 | 1.419 (-1.192 to 4.100) | 0.528 (-3.179 to 4.377) | -3.018 (-5.423 to 0.551) | 0.270 (-2.221 to 2.824) |
| Lag04 | 1.347 (-1.671 to 4.457) | -0.656 (-5.24 to 4.149) | -1.678 (-4.610 to 1.344) | 1.293 (-2.044 to 4.743) |
| Lag05 | 2.298 (-1.314 to 6.043) | 1.651 (-4.132 to 7.782) | -2.068 (-5.560 to 1.552) | 1.399 (-2.970 to 5.964) |
| Lag06 | 1.769 (-2.055 to 5.743) | 3.614 (-3.852 to 11.659) | -2.254 (-6.414 to 2.092) | -0.008 (-5.804 to 6.145) |
| Lag07 | 0.982 (-2.616 to 4.712) | 1.127 (-7.630 to 10.714) | -3.721 (-8.703 to 1.533) | 0.765 (-6.056 to 8.082) |