Table 5. Multivariate logistic regression analysis for %DLCO <80%.

Variables	Odds Ratio	95% CI	P value
%LAA	1.111	1.031–1.199	0.006
%HAA	1.614	1.202–2.169	0.002

Multivariate logistic regression analysis for %DLCO <80% was performed. The multivariate models simultaneously included %LAA and %HAA. Both %low attenuation area (%LAA) and %high attenuation area (%HAA) were significant indicators of impaired diffusion capacity (OR = 1.111, P = 0.006; OR = 1.614, P = 0.002, respectively).

%DLCO, diffusing capacity of the lungs for carbon monoxide measured as percent predicted; CI, confidence interval