Table 2

AUC_ROC and 95% CI for LCI_1/40, LCI_1/30, LCI_1/20 LCI_1/10 and inverse FEV₁% predicted (1.0 indicating best performance, 0.5 indicating poor performance)

	AUC_ROC	95% CI	p Value
LCI_1/40	0.89	0.80 to 0.97	<0.0001
LCI_1/30	0.87	0.77 to 0.96	<0.0001
LCI_1/20	0.87	0.78 to 0.96	<0.0001
LCI_1/10	0.83	0.72 to 0.94	<0.0001
FEV₁% predicted (inverse)	0.73	0.60 to 0.86	0.002

AUC, area under the curve; FEV_1, forced expiratory volume in 1 s; LCI, Lung Clearance Index, ROC, receiver operating characteristic