Table 2.
Summary of diagnostic yield according to lesion size, lobe, location, and bronchus sign when comparing lesions assessed using conventional transbronchial biopsy (TBB) or TBB using endobronchial ultrasonography with a guide sheath (EBUS-GS).
| TBB (n = 19) | EBUS-GS (n = 19) | p-Value | ||
|---|---|---|---|---|
| Size, n (%) | ≤20 mm | 0/7 (0) | 5/7 (71.4) | 0.010 |
| >20 mm | 4/12 (33.3) | 7/12 (58.3) | 0.273 | |
| Lobe, n (%) | Upper | 3/9 (33.3) | 3/5 (60.0) | 0.329 |
| Middle/lingula | 0/0 (0) | 2/2 (100) | - | |
| Lower | 1/10 (10.0) | 7/12 (58.3) | 0.022 | |
| Location, n (%) | Outer | 1/9 (11.1) | 7/12 (58.3) | 0.067 |
| Inner | 3/10 (30) | 5/7 (71.4) | 0.153 | |
| Bronchus sign, n (%) | Positive | 3/16 (18.8) | 9/13 (69.2) | 0.006 |
| Negative | 1/3 (33.3) | 3/6 (50) | 0.635 | |
| Visibility on chest X-ray, n (%) | Visible | 3/17 (17.6) | 9/13 (69.2) | 0.002 |
| Invisible | 1/2 (50) | 3/6 (50) | 0.500 | |
| Total, n/19 (%) | 4/19 (21.1) | 12/19 (63.2) | 0.009 |