Table 5.
Mean values of spirometric parameters in examined groups.
| Spirometric parameter | Agricultural workers (n = 75) | Office workers (n = 75) | P-value* |
|---|---|---|---|
| FVC (% pred) | 84.2 ± 8.6 | 86.4 ± 8.9 | 0.126 |
| FEV1 (% pred) | 82.7 ± 8.3 | 85.1 ± 8.2 | 0.077 |
| FEV1/FVC% | 73.8 ± 4.1 | 74.3 ± 4.6 | 0.483 |
| MEF50 (% pred) | 56.4 ± 6.2 | 60.3 ± 6.4 | 0.002 |
| MEF75 (% pred) | 52.8 ± 5.7 | 60.5 ± 7.1 | 0.000 |
| MEF25-75 (% pred) | 61.3 ± 7.2 | 63.8 ± 8.2 | 0.049 |
Data are expressed as mean value with standard deviation. FVC: forced vital capacity; FEV1: forced expiratory volume in 1 second; MEF50, MEF75, MEF25-75: maximal expiratory flow at 50%, 75%, and 25-75% of FVC, respectively; % pred: % of predicted value.
*
Tested by independent-sample T-test.