FEF25-75Forced Expiratory Flow Between 25% and 75% of Forced Vital Capacity
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The mean lung volume for FVC was 2.21+-0.75, FEV1 was 2.08+-0.73, FEV1/FVC ratio was 92.9+-4.7, PEF was 231.3+-70.5 and (FEF25-75) was 2.68+-1.2 (Table-1).
-In boys, but not girls, higher fat mass was associated with lower levels and lung growth rates of FEV1 and FEF25-75.
Robust linear regression models adjusted for sex, age, height, BMI, sex*age interaction, sex*height interaction, current smoking, and pack-years were used to analyze the cross-sectional association between air pollution exposure and lung function levels, as measured by: [FEV.sub.1], FVC, [FEV.sub.1]/FVC, and FEF25-75. Two-sided p-values <0.05 were considered statistically significant.
A total of 19 patients (30.6%) had small airway obstruction (FEF25-75 <60%), with only three having a smoking history.
With regard to the spirometric index FEF25-75, this study revealed a marked difference between patients colonised by PA and those who were not colonised, with a significantly greater rate of change in the former group.
Mild smokers showed a 5.39% decrease in FEF25-75 whereas a 01% increase in FEV1 / FVC ratio compared to non-smokers.
Both adults and children demonstrate obesity related reductions in FEF25-75 compared to lean subjects [58]; reduced FEF25-75/FVC has been regarded as marker of increased hyperresponsiveness [136].
The exact parameters included in the test can vary somewhat from instrument to instrument; but three parameters, FVC, FEV1, and FVC/FEV1, are universal, and two others, FEF25-75 and maximum flow, are included in most cases.
Eric Jaeger Master Lab pulmonary function equipment was used to measure the forced vital capacity (FVC), forced expiratory volume in one second (FEV1), forced expiratory flow 25-75% (FEF25-75), total lung capacity (TLC), residual volume (RV) and diffusion capacity for carbon monoxide (DLCO).
The readings of FEF25-75 were divided into two groups: normal=80% of predicted and low < 80% of predicted12.