💡 The FEV1/FVC ratio is also called theTiffeneau index. What are FEV1/FVC normal values? The normal FEV1/FVC index valueexceeds 70%— all the results that are beneath this threshold might be a sign of airflow obstruction and require deeper investigation. This situationchanges a bit in peo...
Compared with Europe, after adjusting for age and height, values for men/women were on average 12%/8% lower in the Near East, 14%/20% lower in Africa and 24%/25% lower in the Far East, but this value was highly variable within all regions except Europe. The FEV1/FVC ratio varied ...
在此,关键性气流受限的两个肺功能指标是FEV 1及FVC。FEV 1可同时作为呼气的流量(L/s)和容量指标(L),因而其下降既可反映气道阻塞等引起的呼气流量下降,也可反映受肺容积扩张受限的影响。为了对此进行鉴别,引入了FVC进行矫正,即FEV 1/FVC的比值,比值下降说明FEV 1的降低主要由于气道阻塞引起,否则是由于肺容积...
Any person with a FEV1/FVC ratio <70% or with FEV1 and/or FVC values <80% of predicted values would require special assessment by an expert.34 The same would hold for persons with an abnormal medical history (as discussed); abnormal physical examination with cardiac, respiratory, or ear, ...
(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/10.1007/978-3-642-16483-5_2163 Published10 March 2017 Publisher NameSpringer, Berlin...
To determine the agreement between the FEV1/FEV6 ratio and the FEV1/FVC ratio in an elderly population. The study sample consisted of 3874 participants in a cross-sectional population survey in Tromso¨, Norway, aged 60 years or more, in whom acceptable
Notably, it has been reported that in almost 75% of patients older than 65 years old diagnosed with mild COPD using the GOLD criteria, the measured FEV1/FVC values are within the normal range for healthy age-related and race-matched controls30. Thus, although the fixed FEV1/FVC ratio ...
Hyperlipidemia was identified based on the first diagnosis [24]; (VII) We defined baseline lung func- tion as low when the FEV1/FVC ratio is less than 0.7 [25]. We generated categorical variables based on baseline lung function exposure (normal lung function, low lung function) and lung ...
Objectives: To observe the forced expiratory volume in first second (FEV1) and ratio of forced expiratory volume in first second and forced vital capacity (FEV1/FVC%) in different trimesters of normal pregnant women and to compare them with those of healthy non-pregnant women. Materials and ...
Fixed ratio thresholds 0.66 to 0.74 yielded C statistics that were significantly higher than the LLN threshold (P values <.05). Figure 3. Weighted Youden Index for Various FEV1:FVC Thresholds Across a Range of Relative Weights for Sensitivity and Specificity View LargeDownload The weighted Youden ...