Representative reference equations applicable to the subjects under study
| Author, reference | Reference equation formula | application subject | Reference equation |
||
|---|---|---|---|---|---|
| FEV1 | FVC | ||||
| Crapo et al. 1999 [8] | M | ‒2.0956+0.04052×H‒0.02411×A | ‒3.5922+0.05207×H‒0.01532×A | Central Asia | Central Asian equation |
| F | ‒1.1576+0.03053×H‒0.02234×A | ‒2.1706+0.03889×H‒0.01495×A | |||
| Gnanou et al. 2011 [9] | M | ‒1.284+0.03167×H‒0.027×A | ‒2.176+0.03889×H‒0.027×A | Southeast Asia | Southeast Asian equation |
| F | ‒0.643+0.02265×H‒0.02×A | ‒1.147+0.02695×H‒0.018×A | |||
| Memon et al. 2007 [10] | M | ‒1.44+0.03×H‒0.02×A | ‒0.848+0.032×H‒0.02×A | South Asia | South Asian equation |
| F | ‒1.866+0.032×H‒0.019×A | ‒3.072+0.042×H‒0.02×A | |||
| Choi et al. |
M | ‒3.4132+0.04578×H‒0.0002484×A2 | ‒4.8434‒(0.00008633×A2)+0.01095×W+0.05292×H | Korea | Dr.Choi equation |
| F | ‒2.4114+0.03558×H‒0.000192×A2 | ‒3.0006‒(0.0001273×A2)+0.006892×W+0.03951×H | |||
| Quanjer et al. 2012 [12] | M | exp(‒10.3420+0.0574×ln(A)+2.2196×ln(H)‒0.0351+mu‒spline) | exp(‒11.2281+0.0865×ln(A)+2.4135×ln(H)‒0.0405+mu-spline) | Northeast Asia | GLI2012- |
| F | exp(‒9.6987‒0.0270×ln(A)+2.1211×ln(H)‒0.0149+mu-spline) | exp(‒10.4030‒0.0234×ln(A)+2.2633×ln(H)‒0.0262+mu-spline) | |||
| Quanjer et al. 2012 [12] | M | exp(‒10.3420+0.0574×ln(A)+2.2196×ln(H)‒0.0881+mu-spline) | exp(‒11.2281+0.0865×ln(A)+2.4135×ln(H)‒0.1177+mu-spline) | Southeast Asia | GLI2012-Southeast Asian equation |
| F | exp(‒9.6987‒0.0270×ln(A)+2.1211×ln(H)‒0.1208+mu-spline) | exp(‒10.4030‒0.0234×ln(A)+2.2633×ln(H)‒0.1516+mu-spline) | |||
Abbreviations: A, age; H, height; W, weight, FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; GLI, global lung function initiative; M, male; F, female.
