Table 7.

Multivariable linear models assessing the association of CT abnormalities with lung volumes ^a,b.

CT Abnormality	Total Lung Capacity c			Functional Residual Capacity c			Expiratory Reserve Volume c
	Beta	95% CI	p	Beta	95% CI	p	Beta	95% CI	p
Air Trapping	57	−76, 189	0.40	−71	−169, 27	0.16	−205	−281, −129	<0.001
Emphysema	571	357, 786	<0.001	478	319, 637	<0.001	161	38, 285	0.01
Bronchial Wall Thickening	300	169, 432	<0.001	236	139, 334	<0.001	−46	−122, 30	0.23

^a Adjusted for age, race, BMI, smoking status, WTC exposure and first post-9/11 FEV₁. ^b mL. ^c N = 1226 due to missing covariates. ^d N = 1224 due to missing covariates.