MEF50Maximal Expiratory Flow at 50% (respiratory function)
MEF50Maximal Expiratory Flow at 50% of Vital Flow Capacity
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The highest levels for forced vital capacity (FVC), forced expiratory volume in one second (FEV1), maximal midexpiratory flow (MMEF), peak expiratory flow (PEF), and maximal expiratory flow at 75%, 50%, and 25% of the FVC (MEF75, MEF50, and MEF25 respectively) were taken independently from the three curves.
There was significant negative correlation between duration of smoking and decrease in FEV1, PEF, MEF75, and MEF50 (p < 0.
The enhancement in PEF, MEF75, and MEF50, was around 12% and that of MEF25 was 17%.