Table 3. Flow rates of group I and group II.

The data is presented as mean ± standard deviation

^*P = 0.0000

^†P < 0.0005

PEFR: peak expiratory flow rate, FEF_25-75%: forced expiratory flow 25% to 75%, FEF_25%: forced expiratory flow 25%, FEF_50%: forced expiratory flow 50%, FEF_75%: forced expiratory flow 75%, MVV: maximum voluntary ventilation