2. Factors affecting technical difficulty of procedures to locate PPLs on EBUS (N=109).

Variables	Total (N)	Technical difficulty [n (%)]	Univariate analysis		Multivariate analysis
Variables	Total (N)	Technical difficulty [n (%)]	OR (95% CI)	P	OR (95% CI)	P
EBUS, endobronchial ultrasonography; PPL, peripheral pulmonary lesion; CT, computed tomography; OR, odds ratio; 95% CI, 95% confidence interval.
Sex
Female	49	8 (16.3)	1
Male	60	19 (31.7)	2.375 (0.935−6.035)	0.069	2.150 (0.832−5.555)	0.114
Age (year)
≤60	59	13 (22.0)	1
>60	50	14 (28.0)	1.376 (0.575−3.291)	0.473
Lesion size on CT (mm)
>20	65	16 (24.6)	1
≤20	44	11 (25.0)	1.021 (0.421−2.475)	0.964
Lobe location on CT
Middle lobe	11	2 (18.2)	1
Upper lobe	66	16 (24.2)	1.440 (0.281−7.367)	0.662
Lower lobe	32	9 (28.1)	1.761 (0.317−9.785)	0.518
Lung field on CT
Intermediate band	60	12 (20.0)	1
Lateral band	49	15 (30.6)	1.765 (0.734−4.242)	0.204
Bronchus sign on CT
Present	82	17 (20.7)	1
Absent	27	10 (37.0)	2.249 (0.873−5.793)	0.093	1.972 (0.750−5.190)	0.169
Final diagnosis
Malignant diagnosis	92	22 (23.9)	1
Benign diagnosis	17	5 (29.4)	1.326 (0.421−4.179)	0.630