Table 3.

Multivariate linear regression analysis of the associations between CT measurements and changes in FEV₁ after bronchodilator treatment

	Variables	Standardized estimate	95% CI	p value
RUL	Change in AWV%	−0.07	−0.31 to 0.46	.70
	Change in TAC	0.07	−0.31 to 0.45	.71
	Baseline LAV%	0.13	−0.21 to 0.48	.43
RLL	Change in AWV%	0.35	0.03 to 0.67	.03
	Change in TAC	0.16	−0.16 to 0.48	.33
	Baseline LAV%	0.19	−0.10 to 0.48	.19

Abbreviations: 95% CI, 95% confidence interval; AWV%, airway tree to lung volume percentage ratio; LAV%, low attenuation volume percent; TAC, total airway count.