. 2016 May 26;11:1105–1118. doi: 10.2147/COPD.S102222

Table S1.

Correlation coefficient (r) between FOT parameters and conventional lung function test

	Resistive parameters				Reactive parameters
	R6	R20	RAvr	FDep	X6	X20	XAvr	Fres
Airflow parameters
FEV₁	−0.49^*	−0.07	−0.28^*	0.61^*	0.61^*	0.63^*	0.67^*	−0.66^*
Raw	0.41^*	0.06	0.26^*	−0.49^*	−0.48^*	−0.54^*	−0.55^*	0.57^*
FEF_25–75%	−0.48^*	−0.05	−0.27^*	0.62^*	0.56^*	0.61^*	0.65^*	−0.64^*
Lung volume parameters
FVC	−0.46^*	−0.21^*	−0.36^*	0.43^*	0.47^*	0.48^*	0.52^*	−0.47^*
IC	−0.40^*	−0.22^*	−0.32^*	0.32^*	0.44^*	0.44^*	0.46^*	−0.44^*
RV	0.07	0.24^*	−0.10	−0.31^*	−0.24^*	−0.31^*	−0.26^*	0.28^*
TLC	−0.11	−0.31^*	−0.24^*	−0.11	−0.05	−0.08	−0.05	0.06
RV/TLC	0.29^*	0.06	0.12	−0.45^*	−0.43^*	−0.49^*	−0.45^*	0.45^*

Notes:

P<0.05. The figures illustrate Spearman correlation coefficient (r).

Abbreviations: FDep, frequency dependence; FEV₁, forced expiratory volume in 1 second; FOT, forced oscillation technique; Fres, resonance frequency; FVC, forced vital capacity; IC, inspiratory capacity; R6, resistance at 6 Hz; R20, resistance at 20 Hz; RAvr, average resistance; Raw, airway resistance; RV, residual volume; TLC, total lung capacity; X6, reactance at 6 Hz; X20, reactance at 20 Hz; XAvr, average reactance.