Table 2. Univariate analysis of multiple categorical variables of pneumothorax.
| Variables | Pneumothorax | P value | |
|---|---|---|---|
| No | Yes | ||
| Needle size | |||
| 16 G | 151 (86.3) | 24 (13.7) | 0.129 |
| 17 G | 220 (90.5) | 23 (9.5) | |
| 18 G | 121 (82.3) | 26 (17.7) | |
| 19 G | 24 (85.7) | 4 (14.3) | |
| Nodule size (D) | |||
| D ≤1 cm | 78 (91.8) | 7 (8.2) | 0.139 |
| 1 cm < D ≤2 cm | 245 (88.1) | 33 (11.9) | |
| 2 cm < D ≤3 cm | 193 (83.9) | 37 (16.1) | |
| Pleural passes | |||
| 1 | 429 (87.4) | 62 (12.6) | 0.084 |
| 2 | 76 (88.4) | 10 (11.6) | |
| ≥3 | 11 (68.8) | 5 (31.3) | |
| Location | |||
| Peripheral | 381 (85.6) | 64 (14.4) | 0.215 |
| Intermediate | 89 (90.8) | 9 (9.2) | |
| Hilar | 46 (92.0) | 4 (8.0) | |
| Emphysema | |||
| No | 457 (89.1) | 56 (10.9) | 0.007 |
| Centrilobular | 29 (74.4) | 10 (25.6) | |
| Panlobular | 8 (66.7) | 4 (33.3) | |
| Para-septal | 19 (73.1) | 7 (26.9) | |
| Para-scar | 3 (100.0) | 0 | |
| Position | |||
| Supine | 204 (86.4) | 32 (13.6) | 0.572 |
| Prone | 211 (88.7) | 27 (11.3) | |
| Lateral (right or left) | 101 (84.9) | 18 (15.1) | |
Data are presented as n (%). D, diameter.