Therefore, the forced expiratory volume in one second (FEV1) should be around three-quarters of the FVC. This gives an FEV1:FVC ratio (FEV1/FVC or FEV1%) of around 0.75 or 75% (Miller, 2008). Fig 1 ...

What are the normal ranges for FEV1? Healthy values for FEV1 vary from person to person. They’re based on standards for an average person of that age, race, height, and gender.

Let's take a look at what abnormal values for these tests mean. ... Stage 3: This is when your FEV1 is between 30% to 49% of the normal and your FEV1/FVC ratio is less than 70%.

Results Pulmonary function tests were evaluated from 311 athletes, across 20 Olympic and 13 paralympic sports (48% female, mean +/- SD age: 25 ± 5 years). Supra-normal FEV1 and FVC values were ...

Normal physiology (forced expiratory volume in 1 second [FEV1]/forced vital capacity [FVC] ratio ≥ 0.70 and FVC ≥ 80% of the predicted value). Obstructive physiology (FEV1/FVC ratio < 0.70 ...

Additionally, positive predictive value of the tool was 99% for identifying quantifiable FEV1 values and a recall value of 100%. For 95% of cases, the tool was able to correctly identify FEV1 ...

Therefore, the forced expiratory volume in one second (FEV1) should be around three-quarters of the FVC. This gives an FEV1:FVC ratio (FEV1/FVC or FEV1%) of around 0.75 or 75% (Miller, 2008). Fig 1 ...