Table 2.
Lag effects of per IQR increase in air pollutants on allergic conjunctivitis: single-pollutant model.
| Lag effects | PM2.5 | PM10 | CO | SO2 | NO2 | O3 |
|---|---|---|---|---|---|---|
| Single lag effects RRs (95% CI) | ||||||
| Lag 0 | 0.923 (0.748–1.138) | 0.910 (0.804–1.030) | 1.075 (0.878–1.315) | 0.979 (0.867–1.104) | 0.977 (0.833–1.147) | 0.810 (0.631–1.040) |
| Lag 1 | 1.075 (0.945–1.222) | 1.055 (0.986–1.129) | 1.011 (0.882–1.158) | 1.005 (0.935–1.080) | 1.001 (0.907–1.105) | 0.937 (0.802–1.094) |
| Lag 2 | 1.088 (0.971–1.219) | 1.076 (1.014–1.142) * | 0.993 (0.884–1.116) | 1.007 (0.945–1.073) | 1.037 (0.952–1.129) | 0.974 (0.856–1.110) |
| Lag 3 | 1.036 (0.958–1.121) | 1.038 (0.994–1.083) | 0.997 (0.918–1.084) | 0.998 (0.954–1.044) | 1.061 (1.002–1.124) * | 0.967 (0.878–1.066) |
| Lag 4 | 1.001 (0.911–1.099) | 1.015 (0.965–1.068) | 1.003 (0.907–1.110) | 0.990 (0.939–1.044) | 1.057 (0.985–1.134) | 0.970 (0.870–1.083) |
| Lag 5 | 0.980 (0.910–1.056) | 1.008 (0.968–1.050) | 1.009 (0.934–1.091) | 0.983 (0.943–1.025) | 1.029 (0.974–1.088) | 0.984 (0.900–1.076) |
| Lag 6 | 0.970 (0.904–1.041) | 1.011 (0.971–1.051) | 1.015 (0.945–1.091) | 0.978 (0.940–1.018) | 0.988 (0.938–1.041) | 1.006 (0.920–1.099) |
| Lag 7 | 0.964 (0.838–1.110) | 1.018 (0.944–1.098) | 1.021 (0.88–1.185) | 0.973 (0.900–1.052) | 0.942 (0.847–1.048) | 1.031 (0.877–1.212) |
| Cumulative lag effects RRs (95% CI) | ||||||
| Lag 0–1 | 0.992 (0.804–1.223) | 0.960 (0.842–1.095) | 1.087 (0.888–1.329) | 0.983 (0.866–1.117) | 0.978 (0.835–1.146) | 0.759 (0.565–1.020) |
| Lag 0–2 | 1.079 (0.861–1.353) | 1.033 (0.900–1.186) | 1.079 (0.862–1.350) | 0.990 (0.862–1.137) | 1.014 (0.853–1.205) | 0.740 (0.529–1.036) |
| Lag 0–3 | 1.118 (0.886–1.411) | 1.072 (0.929–1.236) | 1.076 (0.857–1.351) | 0.988 (0.855–1.141) | 1.076 (0.900–1.287) | 0.716 (0.501–1.022) |
| Lag 0–4 | 1.119 (0.872–1.435) | 1.088 (0.934–1.268) | 1.080 (0.849–1.373) | 0.978 (0.838–1.140) | 1.137 (0.939–1.377) | 0.695 (0.476–1.013) |
| Lag 0–5 | 1.097 (0.835–1.440) | 1.097 (0.928–1.296) | 1.090 (0.839–1.416) | 0.961 (0.815–1.135) | 1.171 (0.949–1.444) | 0.684 (0.458–1.022) |
| Lag 0–6 | 1.064 (0.806–1.405) | 1.108 (0.932–1.317) | 1.106 (0.854–1.434) | 0.940 (0.795–1.112) | 1.157 (0.934–1.434) | 0.688 (0.455–1.038) |
| Lag 0–7 | 1.026 (0.763–1.380) | 1.128 (0.938–1.357) | 1.130 (0.865–1.477) | 0.915 (0.769–1.089) | 1.090 (0.867–1.370) | 0.709 (0.459–1.096) |
Bolded represents statistically significant correlation.
RRs, relative risks; *P < 0.05.