Table 1. Baseline characteristics of 74 PLLs.
| Variables | Total | Diagnostic in rEBUS GS TBLB (n=47) |
Non-diagnostic in rEBUS GS TBLB (n=27) |
P value |
|---|---|---|---|---|
| Age, years | 68±11 | 68±12 | 69±8 | 0.98 |
| Gender | 0.75 | |||
| Male | 51 (68.9) | 33 (70.2) | 18 (66.7) | |
| Female | 23 (31.1) | 14 (29.8) | 9 (33.3) | |
| Lesion size, mm | 24±12 | 26±11 | 21±13 | 0.046 |
| Distribution by size | 0.02 | |||
| ≤20 mm | 31 (41.9) | 15 (31.9) | 16 (59.3) | |
| >20 mm | 43 (58.1) | 32 (68.1) | 11 (40.7) | |
| Distance from pleura, mm | 14±14 | 13±14 | 14±16 | 0.78 |
| Location of PLL | 0.39 | |||
| Right upper lobe | 27 (36.5) | 19 (40.4) | 8 (29.6) | |
| Right middle lobe | 4 (5.4) | 3 (6.4) | 1 (3.7) | |
| Right lower lobe | 13 (17.6) | 10 (21.3) | 3 (11.1) | |
| Left upper lobe | 24 (32.4) | 12 (25.5) | 12 (44.4) | |
| Left lower lobe | 6 (8.1) | 3 (6.4) | 3 (11.1) | |
| Opacity of PLL on chest CT | 0.36 | |||
| Subsolid opacity | 15 (20.3) | 8 (17.0) | 7 (25.9) | |
| Solid opacity | 59 (79.7) | 39 (83.0) | 20 (74.1) | |
| Cavity formation on chest CT | 0.41 | |||
| Present | 7 (9.5) | 6 (12.8) | 1 (3.7) | |
| Absent | 67 (90.5) | 41 (87.2) | 26 (96.3) | |
| Bronchus sign on chest CT | 0.16 | |||
| Present | 64 (86.5) | 43 (91.5) | 21 (77.8) | |
| Absent | 10 (13.5) | 4 (8.5) | 6 (22.2) | |
| rEBUS visualization | <0.001 | |||
| Within PLL | 56 (75.7) | 44 (93.6) | 12 (44.4) | |
| Adjacent to PLL | 18 (24.3) | 3 (6.4) | 15 (55.6) | |
| Complication after procedure | NA | |||
| Significant bleeding | 0 (0) | 0 (0) | 0 (0) | |
| Pneumothorax | 0 (0) | 0 (0) | 0 (0) | |
| Final diagnosis | <0.001 | |||
| Malignant | 47 (63.5) | 38 (80.9) | 9 (33.3) | |
| Benign | 19 (25.7) | 9 (19.1) | 10 (37) | |
| Undetermined | 8 (10.8) | 0 (0) | 8 (29.6) |
Data are presented as n (%) or mean ± SD. CT, computed tomography; GS, guide sheath; NA, non-applicable; PLL, peripheral lung lesion; rEBUS, radial endobronchial ultrasound; SD, standard deviation; TBLB, transbronchial lung biopsy.