Table 2 Daily ambient air pollutants, biomarkers, PM2.5-bound heavy metal composition, lung function, and meteorological parameters during the period of the panel study
| Â | Each follow-up time levels (median) | Total follow-up period levels | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
T1 | T2 | T3 | T4 | T5 | T6 | min | Median (25th,75th) | max | IQR | |
Air pollutants | ||||||||||
 PM2.5 (μg/m3) | 278.0 | 66.0 | 138.5 | 149.5 | 88.0 | 186.5 | 33.0 | 132.5 (86.5,198.5) | 401.0 | 112.0 |
 PM10 (μg/m3) | 173.0 | 65.0 | 224.5 | 183.0 | 93.5 | 206.5 | 22.0 | 148.0 (88.5, 215.5) | 369.0 | 127.0 |
 O3 (μg/m3) | 56.0 | 30.5 | 38.0 | 11.0 | 10.5 | 3.5 | 0 | 17.5 (4.5, 48.0) | 200.0 | 43.5 |
 SO2 (μg/m3) | 25.5 | 19.5 | 25.0 | 34.0 | 31.5 | 74.0 | 16.0 | 31.0 (23.0, 39.5) | 113.0 | 16.5 |
 NO2 (μg/m3) | 66.0 | 50.5 | 43.5 | 68.5 | 50.5 | 88.0 | 14.0 | 57.0 (40.5, 71.0) | 119.0 | 30.5 |
 CO (mg/m3) | 2.6 | 1.9 | 2.4 | 2.9 | 3.0 | 4.6 | 0.8 | 2.6 (2.2, 2.6) | 6.0 | 0.85 |
Lung function levels | ||||||||||
 FVC (L) | 3.03 | 3.13 | 3.10 | 3.11 | 3.07 | 3.05 | 2.01 | 3.09 (2.79, 3.62) | 5.39 | 0.83 |
 FEV1 (L) | 2.62 | 2.80 | 2.87 | 2.82 | 2.79 | 2.75 | 1.31 | 2.78 (2.53, 3.24) | 5.01 | 0.71 |
 FEV1/FVC (%) | 87.10 | 92.65 | 92.91 | 92.50 | 92.26 | 90.53 | 47.46 | 90.92 (85.02, 95.65) | 100 | 10.63 |
 FEF25 (L/s) | 3.92 | 4.76 | 4.76 | 5.10 | 4.79 | 4.60 | 0.55 | 4.51 (3.24, 5.41) | 9.04 | 2.17 |
 FEF75 (L/s) | 2.03 | 2.24 | 2.34 | 2.38 | 2.25 | 2.24 | 0.87 | 2.43 (1.91, 3.03) | 8.33 | 1.12 |
 PEF (L/s) | 4.13 | 4.92 | 5.00 | 5.27 | 4.90 | 4.94 | 1.04 | 4.83 (3.89, 5.69) | 9.52 | 1.80 |
 MVV (L/min) | 69.20 | 79.15 | 88.40 | 87.95 | 87.65 | 92.35 | 14.30 | 84.65 (69.22, 105.95) | 175.00 | 36.73 |
 MV (L/min) | 8.17 | 8.57 | 9.05 | 9.53 | 8.75 | 9.18 | 2.04 | 8.82 (7.07, 11.18) | 28.06 | 4.11 |
Biomarkers | ||||||||||
 IL-6 (pg/mL) | 6.3 | 17.7 | 33.4 | 9.2 | 12.6 | 52.0 | 0.1 | 22.10 (3.53, 54.10) | 852.2 | 50.57 |
 IL-8 (pg/mL) | 39691.9 | 21792.6 | 41135.9 | 17431.7 | 23894.9 | 36387.8 | 213.0 | 28944.3 (11372.2, 56421.2) | 154813.1 | 45049.0 |
 TNF-α (pg/mL) | 26.0 | 10.0 | 19.7 | 29.8 | 87.7 | 62.4 | 0.2 | 44.51 (12.87, 87.75) | 522.0 | 74.88 |
 8-epi-PGF2a (pg/mL) | 83638.3 | 71937.5 | 51730.8 | 47157.1 | 56559.0 | 91455.5 | 670.7 | 64942.9 (28634.1, 107913.1) | 193830.7 | 79279.0 |
Weather | ||||||||||
 Temperature (℃) | 27.0 | 12.9 | 7.7 | 4.8 | 1.6 | 6.6 | -2.0 | 6.8 (4.0, 12.9) | 30.5 | 8.9 |
 Relative humidity (%) | 61.0 | 54.0 | 30.5 | 54.5 | 44.5 | 50.0 | 19.0 | 50.0 (41.0, 56.0) | 84.0 | 15.0 |