![Re-Defining Lower Limit of Normal for FEV1/FEV6, FEV1/FVC, FEV3/FEV6 and FEV3/FVC to Improve Detection of Airway Obstruction. - Abstract - Europe PMC Re-Defining Lower Limit of Normal for FEV1/FEV6, FEV1/FVC, FEV3/FEV6 and FEV3/FVC to Improve Detection of Airway Obstruction. - Abstract - Europe PMC](https://europepmc.org/articles/PMC5556964/bin/JCOPDF-2-094-t002.jpg)
Re-Defining Lower Limit of Normal for FEV1/FEV6, FEV1/FVC, FEV3/FEV6 and FEV3/FVC to Improve Detection of Airway Obstruction. - Abstract - Europe PMC
![Using the lower limit of normal for the FEV1/FVC ratio reduces the misclassification of airway obstruction | Thorax Using the lower limit of normal for the FEV1/FVC ratio reduces the misclassification of airway obstruction | Thorax](https://thorax.bmj.com/content/thoraxjnl/63/12/1046/F2.large.jpg)
Using the lower limit of normal for the FEV1/FVC ratio reduces the misclassification of airway obstruction | Thorax
![Table 4 from Efficacy of the FEV1/FEV6 ratio compared to the FEV1/FVC ratio for the diagnosis of airway obstruction in subjects aged 40 years or over. | Semantic Scholar Table 4 from Efficacy of the FEV1/FEV6 ratio compared to the FEV1/FVC ratio for the diagnosis of airway obstruction in subjects aged 40 years or over. | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/17461a34cc7af549a6faf07cb3758aab6ba72324/5-Table4-1.png)
Table 4 from Efficacy of the FEV1/FEV6 ratio compared to the FEV1/FVC ratio for the diagnosis of airway obstruction in subjects aged 40 years or over. | Semantic Scholar
![Scatter plots showing the relationship between the FEV1/FVC ratio and... | Download Scientific Diagram Scatter plots showing the relationship between the FEV1/FVC ratio and... | Download Scientific Diagram](https://www.researchgate.net/publication/313830346/figure/fig4/AS:463107601506307@1487424864104/Scatter-plots-showing-the-relationship-between-the-FEV1-FVC-ratio-and-Rfe-Rfe-increased_Q640.jpg)