MEF50

AcronymDefinition
MEF50Maximal Expiratory Flow at 50% of Vital Flow Capacity
MEF50Maximal Expiratory Flow at 50% (respiratory function)
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References in periodicals archive ?
Step-wise regression analysis of the PFT parameters with the independent variables (height, age, and weight) showed that height alone contributed the maximum variance in the PFT parameters [FEV.sub.1] and MEF25, whereas age alone contributed for MEF50, MEF75, MMEF, and PEF.
Table 2: Pearson's correlation analyses of PFT parameters with variables (height, age, and weight) PFT parameter Height (r-value) Age (r-value) Weight (r-value) FVC 0.9795 ** 0.9678 ** 0.9089 ** [FEV.sub.1] 0.9722 ** 0.9639 ** 0.9068 ** [FEV.sub.1]/FVC 0.1344 * 0.1539 * 0.1566 * MEF25 0.8553 ** 0.8552 ** 0.7879 ** MEF50 0.8949 ** 0.8988 ** 0.8277 ** MEF75 0.8335 ** 0.8416 ** 0.7877 ** MMEF 0.8971 ** 0.9002 ** 0.8292 ** PEF 0.9004 ** 0.9040 ** 0.8524 ** *, Not significant (p > 0.05); **, very highly significant (p < 0.001).
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 < 0.05 to p < 0.01).