MEF25

AcronymDefinition
MEF25Maximal Expiratory Flow at 25% of Forced Vital Capacity
MEF25Maximum Expiratory Flow at 25 Percent
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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).
All values of pulmonary function tests in smokers were significantly lower than those of nonsmoker subjects (p < 0.02 to P < 0.001) except MEF25. There was significant negative correlation between duration of smoking and decrease in FEV1, PEF, MEF75, and MEF50 (p < 0.05 to p < 0.01).