Table 5.: Mean post-bronchodilator values of spirometric parameters in the examined subjects.

Spirometric Parameter Dairy Farmers (n = 52) Office Workers (n = 52) P-Value*
FVC (% pred) 88.1 ± 10.3 92.3 ± 10.1 0.0382
FEV1 (% pred) FEV1/FVC% 83.2 ± 8.1 73.6 ± 4.2 87.6 ± 7.9 75.8 ± 4.5 0.0060 0.0114
MEF50 (% pred) MEF75 (% pred) 57.6 ± 6.5 56.2 ± 5.8 62.4 ± 6.1 61.9 ± 5.4 0.0002 0.0000
MEF25-75 (% pred) 63.1 ± 6.5td> 65.9 ± 7.8 0.0494

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.