Chronic airflow limitation (CAL) can be defined as fixed ratio of forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC) < 0.70 after bronchodilation. It is unclear which is the most optimal ratio in relation to respiratory morbidity. The aim was to investigate to what extent ...
© 2011 Springer-Verlag Berlin Heidelberg About this entry Cite this entry (2011). FEV1/FVC Ratio. In: Schwab, M. (eds) Encyclopedia of Cancer. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16483-5_2163 Download citation .RIS .ENW .BIB DOIhttps://doi.org/10.1007/9...
Furthermore, as age increases, more and more people have a ratio in the “COPD” range, and in young children, FEV1/FVC of 75% is very abnormal183; so using a fixed ratio across the developmental spectrum is akin to defining short stature as being 120 cm tall without knowing the age...
Using the lower limit of normal for the FEV1/FVC ratio reduces the misclassification of airway obstruction. Aim: The prevalence of airway obstruction varies widely with the definition used. Objectives: To study differences in the prevalence of airway obstruction ......
The American Thoracic Society recommends using the lower limit of normal (LLN) method to diagnose obstructive lung disease. However, few studies have investigated the clinical relevance of these recommendations. We compared the LLN derived from available data sets to a fixed ratio (FEV1/FVC, < 75...
The correct FEV1 value should be greater than 80% of the predicted value. The normal FVC value should be greater than 80% of the predicted value. Happy with the FEV1/FVC ratio calculator? Don't hesitate to check our other pulmonary tools; let's start with the tidal volume calculator or ...
bP-values and combined P-values are based on linear regression analysis on the FEV1/FVC ratio and adjusted for age, gender, site and height. 43.33 52.39 2.75 1.54 Reference − 0.43 (0.14) 1.91 × 10 − 3 − 0.58 (0.42) 0.16 0.17 (0.55) 0.76 Our findings identified genetic ...
The aim of this study was to evaluate whether the FEV 1 /FVC ratio in the lower range of normality is associated with worse outcomes in asthmatics without airway obstruction. Methods We screened asthmatics at eight clinics. Subjects answered the Asthma Control Questionnaire and underwent ...
Should FEV1/FEV6 Replace FEV1/FVC Ratio To Detect Airway Obstruction?: A Metaanalysis A meta-analysis. Chest 2009;135:991--8.Jing JY,Huang TC,Cui W,et al.Should FEV1/FEV6 replace FEV1/FVC ratio to detect airway obstruction? A meta... Ji-yong,Jing,Tian-cha,... - 《Chest》 被引...
Objective To investigate the impact of using low limit of normal(LLN) for FEV1/FVC ratio and fixed ratio(70%) as cut-off point in the qualitative diagnosis... YY Zhou,L Liu,HU Li-Juan,... - 《Chinese Journal of Respiratory & Critical Care Medicine》 被引量: 2发表: 2009年 Factors ...