Table 2.

Unadjusted and adjusted comparisons of the three QCT measurements of emphysema (LAV%, >2.5%) and proximal (WAP, per 5% units), and distal (MLA_EI, >87.4%) airway disease, among three spirometrically defined groups. The multinomial logistic regression models were adjusted for age, sex, race/ethnicity, BMI, baseline smoking status and smoking pack-years, and early arrival (within 48 hours) at the WTC disaster site.

QCT metric	Comparison	OR	95% CI	ORadj	95% CI
WAP	Low FVC vs. Normal	1.32	1.15, 1.52	1.25	1.08, 1.46
	COPD vs. Low FVC	1.11	0.87, 1.42	1.13	0.87, 1.47
	COPD vs. Normal	1.47	1.17, 1.85	1.41	1.10, 1.80
MLAEI	Low FVC vs. Normal	0.74	0.37, 1.48	0.85	0.40, 1.79
	COPD vs. Low FVC	6.56	2.69, 16.02	5.64	2.02, 15.76
	COPD vs. Normal	4.83	2.43, 9.60	4.77	2.03, 11.20
LAV%	Low FVC vs. Normal	0.48	0.14, 1.61	0.53	0.15, 1.87
	COPD vs. Low FVC	10.36	2.95, 36.43	7.42	1.94, 28.31
	COPD vs. Normal	4.98	2.40, 10.32	3.94	1.58, 9.82