Table 2.
Lung function indicators between the PM2.5 exposed group and control group.
| Indexes | Exposed Group (n = 140) | Control Group (n = 140) | t | p |
|---|---|---|---|---|
| FVC (liter) | 3.41 ± 0.99 | 3.65 ± 1.22 | −1.807 | 0.072 |
| FVC% | 90.17 ± 16.70 | 91.98 ± 24.06 | −0.731 | 0.465 |
| FEV1.0 (liter) | 3.28 ± 0.95 | 3.54 ± 1.13 | −2.084 | 0.038 |
| FEV1.0% | 100.21 ± 17.89 | 103.61 ± 26.38 | −1.262 | 0.208 |
| MMEF (liter/second) | 5.69 ± 2.14 | 6.28 ± 1.90 | −2.439 | 0.035 |
| PEFR (liter/second) | 8.97 ± 3.27 | 9.93 ± 3.02 | −2.552 | 0.011 |
| PEFR% | 104.04 ± 27.80 | 110.89 ± 26.73 | −2.102 | 0.036 |
| FEF75 (liter/second) | 4.21 ± 1.78 | 4.63 ± 1.67 | −2.036 | 0.043 |
| FEF75% | 206.14 ± 81.03 | 235.57 ± 85.31 | −2.960 | 0.003 |
| FEF50 (liter/second) | 6.90 ± 2.63 | 7.45 ± 2.32 | −1.856 | 0.065 |
| FEF50% | 151.81 ± 49.70 | 164.54 ± 47.60 | −2.189 | 0.029 |
| FEF25 (liter/second) | 8.76 ± 3.28 | 9.54 ± 3.03 | −2.067 | 0.040 |
| FEF25% | 122.82 ± 36.47 | 131.43 ± 34.31 | −2.035 | 0.043 |
| FEF50/FEF25 | 80.44 ± 15.82 | 79.50 ± 14.17 | 0.524 | 0.601 |
| FEV1.0/FVC% | 111.64 ± 0.09 | 113.10 ± 0.07 | −151.511 | <0.001 |
| MVV | 135.42 ± 35.57 | 144.02 ± 45.45 | −1.763 | 0.079 |
FVC: forced vital capacity; FEV1.0: forced expiratory volume in one second; MMEF: maximum mid expiratory flow; PEFR: peak expiratory flow rate; FEF: forced expiratory flow; MVV: maximum ventilatory volume.