![](/images/graphics-bg.png)
Fixed cut-off for FEV1FEV6 and FEV6 in detection of obstructive and restrictive patterns
Joint Authors
Aghili, Rokhsareh
Kia, Maryam
Maysami, Ali Basha
Aqili, Sayyid Mujtaba
Paknejad, Omalbanin
Source
Iranian Red Crescent Medical Journal
Issue
Vol. 15, Issue 2 (28 Feb. 2013), pp.152-156, 5 p.
Publisher
Publication Date
2013-02-28
Country of Publication
United Arab Emirates
No. of Pages
5
Main Subjects
Topics
Abstract EN
Background : Chronic obstructive pulmonary diseases (COPD) have been defined by the Global Initiative for Chronic Obstructive Lung Disease (GOLD) as irreversible conditions which are diagnosed by fixed cut-off points of FEV1 / FVC.
Objective : The aim of this study was to determine the cut-off points for FEV1 / FEV6 ratio and FEV6 as alternatives for FEV1 / FVC and FVC in detection of airway obstruction and lung restriction, respectively.
Materials and Methods : A total of 318 Spiro metric examinations of subjects referred to Shariati hospital were analyzed.
A subject was considered to have obstruction if FEV1 / FVC was lower than 70 %.
The restriction was defined as FVC & lt ; 80 % in the absence of obstruction.
The Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of FEV1 / FEV6 and FEV6 were calculated.
Results : This study shows that the current cut-off points used to detect obstruction and restriction can be replaced by FEV1 / FEV6 & lt ; 71 % and FEV6 & lt ; 83 %, respectively.
FEV1 / FEV6 had sensitivity of 95.5 % and specificity of 99.4 % ; the PPV and NPVs were 99.3% and 96.3 %.
The prevalence of obstruction was 49.4 %.
For restrictive pattern, FEV6 had sensitivity of 93 %, specificity of 79.5 % with PPV of 18 % and NPV of 99.5 %.
The prevalence of restriction was 6.3 %.
Conclusions : The FEV1/FEV6 ratio can be used as a valid surrogate for FEV1 / FVC in the diagnosis of airway obstruction, especially for screening purposes in high-risk populations for COPD.
Moreover, FEV6 is an acceptable alternative for FVC in detection of restrictive pattern.
American Psychological Association (APA)
Aghili, Rokhsareh& Kia, Maryam& Maysami, Ali Basha& Aqili, Sayyid Mujtaba& Paknejad, Omalbanin. 2013. Fixed cut-off for FEV1FEV6 and FEV6 in detection of obstructive and restrictive patterns. Iranian Red Crescent Medical Journal،Vol. 15, no. 2, pp.152-156.
https://search.emarefa.net/detail/BIM-329134
Modern Language Association (MLA)
Aghili, Rokhsareh…[et al.]. Fixed cut-off for FEV1FEV6 and FEV6 in detection of obstructive and restrictive patterns. Iranian Red Crescent Medical Journal Vol. 15, no. 2 (2013), pp.152-156.
https://search.emarefa.net/detail/BIM-329134
American Medical Association (AMA)
Aghili, Rokhsareh& Kia, Maryam& Maysami, Ali Basha& Aqili, Sayyid Mujtaba& Paknejad, Omalbanin. Fixed cut-off for FEV1FEV6 and FEV6 in detection of obstructive and restrictive patterns. Iranian Red Crescent Medical Journal. 2013. Vol. 15, no. 2, pp.152-156.
https://search.emarefa.net/detail/BIM-329134
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 155-156
Record ID
BIM-329134