TABLE 5.

Univariate and multivariate analysis of factors affecting diagnostic yield of the ultrathin bronchoscope (UTB)

Variables	Other methods (N = 27)	UTB (N = 93)	Univariate‐ p‐value	Adjusted OR (95% CI)	Multivariate‐ p‐value
Gender (Male/Female)	19/8	59/34	0.65
Lobar location			0.31
Right upper lobe	7 (25.9)	39 (41.9)
Right middle lobe	1 (3.7)	7 (7.5)
Right lower lobe	3 (11.1)	16 (17.2)
Left upper segment	8 (29.6)	16 (17.2)
Left lingular segment	3 (11.1)	6 (6.5)
Left lower lobe	5 (18.5)	9 (9.6)
Lesion size (≥30 mm/<30 mm)	10/17	35/58	1
Lesion size (≥20 mm/<20 mm)	16/11	72/21	0.08
Lesion location from the hilum			0.27
Central	3 (11.1)	18 (19.4)
Intermediate	13 (48.1)	51 (54.8)
Peripheral	11 (40.7)	24 (25.8)
Distance to the pleura, mean ± SD, mm	13.4 ± 11.3	18.0 ± 15.1	0.14
Distance between the lesion and opening of the lobar bronchus, mean ± SD, mm	66.1 ± 20.4	57.4 ± 16.0	4.90E‐02
Bronchus sign on CT (leading to/adjacent to)	25/2	85/8	1.0
Appearance on CT (solid/part‐solid)	24/3	92/1	0.04	24.4 (2.3–259.3)	8.08E‐03
Bronchial generation of the lesion (≤5/>5)	12/15	66/27	2.05E‐02
EBUS time, mean ± SD, s	207.6 ± 143.8	160.1 ± 137.1	0.12
Total procedural time, mean ± SD, s	922.2 ± 219.0	889.2 ± 290.7	0.59
Location of probe in relation to the lesion confirmed by R‐EBUS (within/not within)	20/7	84/9	4.87E‐02
Bronchial generation of bronchoscope (≤5/>5)	16/11	81/12	3.87E‐03	5.7 (2.0–16.3)	9.79E‐04
Fluoroscopy (Yes/No)	11/16	49/44	0.38
Number of specimens per lesion, mean ± SD, times	5.4 ± 1.4	6.0 ± 1.3	0.07
Final diagnosis (benign/malignant)	8/19	12/81	0.07	3.4 (1.1–10.5)	0.03

Note: Data are presented as N (%) unless otherwise noted.

Abbreviations: CT, computed tomography; EBUS, endobronchial ultrasound; SD, standard deviation; UTB, ultrathin bronchoscope.