Defining and grading an obstructive ventilatory defect (OVD): ‘FEV1/FVC lower limit of normal (LLN) vs. Z-score’ and ‘FEV1 percentage predicted (%pred) vs. Z-score’

An obstructive ventilatory defect (OVD) is defined by a low forced expiratory volume/‘forced/slow’ vital capacity (FEV1/FVC) (e.g. <lower limit of normal (LLN)). However, the LLN can be estimated either by the 90% confidence interval (or the 90th percentile) (American Thoracic and the European Re...

Full description

Bibliographic Details
Published in:	Libyan Journal of Medicine
Main Authors:	Rim Kammoun, Ines Ghannouchi, Sonia Rouatbi, Helmi Ben Saad
Format:	Article
Language:	English
Published:	Taylor & Francis Group 2018-01-01
Subjects:	Bronchial obstruction diagnosis interpretation international guidelines
Online Access:	http://dx.doi.org/10.1080/19932820.2018.1487751

Similar Items

Differences between FEV6, FVC and VC at the diagnosis of obstructive ventilatory defect
by: C.S. Sousa, et al.
Published: (2024-03-01)

The Relationship between Physical Activity and FEV1/FVC in Asthmatics
by: Andis Putri Nawangasri, et al.
Published: (2022-02-01)

Association between 25-hydroxy vitamin D and lung function (FEV1, FVC, FEV1/FVC) in children and adults with asthma: A systematic review
by: Meryem Abi-Ayad, et al.
Published: (2023-01-01)

Comparison between reference values for FVC, FEV1, and FEV1/FVC ratio in White adults in Brazil and those suggested by the Global Lung Function Initiative 2012
by: Carlos Alberto de Castro Pereira, et al.
Published: (2014-08-01)

Rapid FEV1 decline and the effects of both FEV1 and FVC on cardiovascular disease: A UK biobank cohort analysis
by: Jiahui Zhang, et al.
Published: (2024-11-01)

The effect of age on pulmonary performance using (FEV1/FVC) % as indicator
by: Taghreed A. Hussain, et al.
Published: (2011-01-01)

FVC, but not FEV1, is associated with clinical outcomes of asthma-COPD overlap
by: Tai Joon An, et al.
Published: (2022-08-01)

Evaluation of Different Dyspnea Scales in Smokers with Preserved FEV1/FVC Ratio
by: Besim Morina, et al.
Published: (2025-03-01)

Association between FEV1/FVC levels and all-cause mortality in the general population
by: Leheng Tang, et al.
Published: (2025-03-01)

FEV1 is a better predictor of mortality than FVC: the PLATINO cohort study.
by: Ana Maria B Menezes, et al.
Published: (2014-01-01)

Preoperative FEV1/FVC as a predictor of prolonged air leak following pulmonary lobectomy
by: Miao-Miao Yang, et al.
Published: (2024-04-01)

Impacts of cigarette smoking on epistasis and gender-specific effects of FEV1/FVC ratio in human
by: Xu Changwei, et al.
Published: (2014-07-01)

Understanding the use of z-scores and LLN in pulmonary function test reports
by: Sunil K. Chhabra
Published: (2025-01-01)

Genome organization and molecular characterization of the three Formica exsecta viruses—FeV1, FeV2 and FeV4
by: Kishor Dhaygude, et al.
Published: (2019-02-01)

Early diagnostic and prognostic value of FEV₃/FEV₆ for COPD in underserved areas
by: Fei Li, et al.
Published: (2025-08-01)

PeakPETCO2 combined with FEV1/FVC predicts vasodilator‐responsive patients with idiopathic pulmonary arterial hypertension
by: Ci‐Jun Luo, et al.
Published: (2021-10-01)

PENGARUH SUPLEMENTASI VITAMIN D TERHADAP NILAI PENGUKURAN FEV1/ FVC PADA PENDERITA ASMA TERKONTROL SEBAGIAN
by: Adyan Donastin, et al.
Published: (2018-04-01)

The effect of a post-bronchodilator FEV1/FVC < 0.7 on COPD diagnosis and treatment: a regression discontinuity design
by: Alexander T. Moffett, et al.
Published: (2025-04-01)

Association of ABO Blood group phenotypes with FEV1/FVC values among students of Aziz Fatima Medical and Dental College
by: Hira Zahid, et al.
Published: (2024-06-01)

The Ventilatory and Diffusion Dysfunctions in Obese Patients with and without Obstructive Sleep Apnea-Hypopnea Syndrome
by: Sonia Rouatbi, et al.
Published: (2020-01-01)

Allergen bronchoprovocation: correlation between FEV1 maximal percent fall and area under the FEV1 curve and impact of allergen on recovery
by: Sarah-Marie Durr, et al.
Published: (2023-01-01)

Association of high-sensitivity CRP and FEV1%pred: a study on non-pulmonary disease in a population in Beijing, China
by: Xiaoyu Ma, et al.
Published: (2024-07-01)

Expediente ano 1, n. 1, fev. 1999
by: Expediente Revista de Ciências da Administração
Published: (1999-01-01)

Clinical significance of FEV0.5 and FEV0.75 in the determination of pulmonary function in children with bronchial asthma
by: ZHENG Guimei, et al.
Published: (2023-10-01)

Variability of FEV1 and Criterion for Acute Pulmonary Exacerbation
by: Bradlee eJenkins, et al.
Published: (2014-10-01)

Impulse oscillometry-derived equation for prediction of abnormal FEV1/FVC ratio for COPD screening in Chinese population: a multicenter cross-sectional studyResearch in context
by: Meishan Liu, et al.
Published: (2025-03-01)

Vocal biomarkers correlate with FEV1 variations during methacholine challenge
by: Giovanni Paoletti, et al.
Published: (2025-04-01)

HEMIS: Electrical Powertrain Health Monitoring for Increased Safety of FEVs
by: B. Sedano, et al.
Published: (2013-07-01)

The predictive role of lung clearance index on FEV1 decline in cystic fibrosis
by: Beste Özsezen, et al.
Published: (2024-07-01)

Comparison of predicted postoperative forced expiratory volume in the first second (FEV1) using lung perfusion scintigraphy with observed forced expiratory volume in the first second (FEV1) post lung resection
by: Boon Mathew, et al.
Published: (2020-04-01)

Prospects of FEV6 using as alternative indicator of respiratory function assessment
by: O. V. Myronenko, et al.
Published: (2017-10-01)

Laboratory Constraints on the Neutron-Spin Coupling of feV-Scale Axions
by: Junyi Lee, et al.
Published: (2023-03-01)

An updated comparison of standard and novel FEV1 indices' association with all-cause mortality.
by: Stephen T Russell, et al.
Published: (2025-01-01)

Preoperative DLco and FEV1 are correlated with postoperative pulmonary complications in patients after esophagectomy
by: Taeyun Kim, et al.
Published: (2024-03-01)

Semina: Ciênc. Agrár. Londrina, v. 45, n. 1, jan./fev. 2024
by: Semina: Ciênc. Agrár. Londrina, v. 44, n. 6, nov./dez. 2023
Published: (2024-02-01)

Semina: Ciências Agrárias, Londrina, v. 44, n. 1, jan./fev. 2023
by: Edilaine Aparecida Soares
Published: (2023-04-01)

Peak expiratory flow as an endpoint for clinical trials in asthma: a comparison with FEV1
by: David M. G. Halpin, et al.
Published: (2019-07-01)

Bacteriophages fEV-1 and fD1 Infect <i>Yersinia pestis</i>
by: Mikael Skurnik, et al.
Published: (2021-07-01)

Theoretical application and factors influencing casting settlement of FeV50 alloy
by: YU Bin, et al.
Published: (2017-12-01)

Relationship between FEV1 and Cardiovascular Risk Factors in General Population without Airflow Limitation
by: Jeong Hyeon Lee, et al.
Published: (2016-01-01)