WangS, GongW, TianY, ZhouJ. FEV1/FEV6 in primary care is a reliable and easy method for the diagnosis of COPD. Respir Care, 2016; 61(3):349–353.
2.
SwanneyMP, JensenRL, CrichtonDA, BeckertLE, CardnoLA, CrapoRO. FEV6 is an acceptable surrogate for FVC in the spirometric diagnosis of airway obstruction and restriction. Am J Respir Crit Care Med, 2000; 162(3 Pt 1):917–919.
3.
VandevoordeJ, VerbanckS, SchuermansD, KartounianJ, VinckenW. FEV1/FEV6 and FEV6 as an alternative for FEV1/FVC and FVC in the spirometric detection of airway obstruction and restriction. Chest, 2005; 127(5):1560–1564.
4.
RobertsSD, FarberMO, KnoxKS, PhillipsGS, BhattNY, MastronardeJG, WoodKL. FEV1/FVC ratio of 70% misclassifies patients with obstruction at the extremes of age. Chest, 2006; 130(1):200–206.
5.
AggarwalAN, GuptaD, BeheraD, JindalSK. Comparison of fixed percentage method and lower confidence limits for defining limits of normality for interpretation of spirometry. Respir Care, 2006; 51(7):737–743.
6.
SwanneyMP, RuppelG, EnrightPL, PedersenOF, CrapoRO, MillerMR, et al. Using the lower limit of normal for the FEV1/FVC ratio reduces the misclassification of airway obstruction. Thorax, 2008; 63(12):1046–1051.
7.
MillerMR, QuanjerPH, SwanneyMP, RuppelG, EnrightPL. Interpreting lung function data using 80% of predicted and fixed thresholds misclassifies over 20% of patients. Chest, 2011; 139(1):52–59.
8.
KimN, KimSY, SongY, SuhC, KimKH, KimJH, et al. The effect of applying ethnicity-specific spirometric reference equations to Asian migrant workers in Korea. Ann Occup Environ Med, 2015; 27:14.
9.
KnudsonRJ, LebowitzMD, HolbergCJ, BurrowsB. Changes in the normal maximal expiratory flow-volume curve with growth and aging. Am Rev Respir Dis, 1983; 127(6):725–734.
10.
QuanjerPH, StanojevicS, ColeTJ, BaurX, HallGL, CulverBH, et al. Multi-ethnic reference values for spirometry for the 3-95-yr age range: the global lung function 2012 equations. Eur Respir J, 2012; 40(6):1324–1343.
11.
SmithM, LiL, AugustynM, KurmiO, ChenJ, CollinsR, et al. Prevelence and correlates of airflow obstruction in ∼317,000 never-smokers in China. Eur Respir J, 2014; 44(1):66–77.
12.
PellegrinoR, ViegiG, BrusascoV, CrapoRO, BurgosF, CasaburiR, et al. Interpretative strategies for lung function tests. Eur Respir J, 2005; 26(5):948–968.
