Table 4.
Estimated crude and adjusted odds ratios for the association between pollutants and symptoms among the study participants using generalized estimating equations (GEE)
| Pollutant | # | Symptoms | Symptoms | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Skin itching | Sleep disturbance | Skin itching | Sleep disturbance | ||||||
| Crude OR (95%CI) | p value | Crude OR (95%CI) | p value | Adjusted OR **(95%CI) | p value | Adjusted OR** (95%CI) | p value | ||
| PM2.5(μg/m3)* | Same day | 1.20 (1.09–1.32) | <0.001 | 1.26 (1.17–1.35) | <0.001 | 1.17 (1.07–1.28) | 0.001 | 1.24 (1.14–1.34) | <0.001 |
| Lag 1 | 1.14 (1.03–1.27) | 0.015 | 1.18 (1.09–1.27) | <0.001 | 1.18 (1.05–1.32) | 0.005 | 1.21 (1.12–1.30) | <0.001 | |
| Lag 2 | 1.16 (1.06–1.27) | 0.001 | 1.31 (1.20–1.44) | <0.001 | 1.18 (1.06–1.30) | 0.002 | 1.33 (1.22–1.45) | <0.001 | |
| PM10 (μg/m3)* | Same day | 1.07 (1.03–0.10) | <0.001 | 1.10 (1.07–1.13) | <0.001 | 1.06 (1.02–1.10) | 0.001 | 1.09 (1.06–1.13) | <0.001 |
| Lag 1 | 1.04 (1.01–1.08) | 0.023 | 1.04 (1.02–1.07) | 0.001 | 1.05 (1.00–1.10) | 0.029 | 1.05 (1.02–1.08) | 0.001 | |
| Lag 2 | 1.08 (1.04–1.13) | <0.001 | 1.12 (1.08–1.16) | <0.001 | 1.09 (1.04–1.14) | <0.001 | 1.13 (1.09–1.17) | <0.001 | |
# Same day, Lag1, Lag2 represent the air pollutant concentrations on 1, 2, and 3 days before symptom reporting, respectively
*OR for 10μg/m3 increase in concentration of air pollutant
**Adjusted by outdoor stay and relative humidity