Table 3.

Pearson r correlations between CT metrics and FEV₁, FEV₁/FVC, ESI scores

	FEV1/FVC		FEV1%		ESI
	r	p	r	p	r	p
%LAA-950insp	−0.67	<.01	−0.50	<.01	0.81	<.01
%LAA-856exp	−0.71	<.01	−0.58	<.01	0.74	<.01
AWTPi10	−0.11	.11	−0.22	<.01	0.13	.09
%fLDA	−0.49	<.01	−0.42	<.01	0.46	<.01
%pLDA	−0.68	<.01	−0.52	<.01	0.80	<.01

Legend: AWTPi10 airway wall thickness at an internal perimeter of 10 mm, ESI emphysema severity index, FEV₁% forced expiratory volume in 1 s, %fLDA percentage of functional low density area, FVC forced vital capacity, % LAA_-950insp percentage of lung attenuation area with values <− 950 Hounsfield Units at inspiratory CT scan, %LAA_-856exp percentage of lung attenuation area with values <− 856 Hounsfield Units at expiratory CT scan, %pLDA percentage of persistent low density area