Incidental Paratracheal Air Cysts on Thoracic CT and Their Association with Chronic Inflammatory Lung Disease

Table 3

Demographics and the prevalence of upper lung fibrosis, emphysema, and bronchiectasis in patients with or without PACs.

Variables	PAC+ ()	PACs– ()	Univariable P	Multivariable P	Odds ratio (95% CI)
Age (mean ± SD)	63.44 ± 13.55	63.45 ± 14.39	0.989	0.619
Sex			1	0.795
Male	184 (59.0%)	184 (59.0%)
Female	127 (41.0%)	127 (41.0%)
Upper lung fibrosis	210 (67.5%)	125 (40.2%)	<0.001	<0.001	2.921 (2.07–4.106)
Emphysema	61 (21.9%)	54 (17.4%)	0.157	0.877
Bronchiectasis	88 (28.3%)	53 (17.0%)	0.001	0.059

Note. All data except P values are presented as numbers (percentages) of patients.
PAC = paratracheal air cysts, CI = confidence interval, SD = standard deviation, and = number.
Patients with PACs; patients without PACs.