Table 2: Comparison of the clinical findings by treatment (n = 125).
| Chest drainage (-) | Chest drainage (+) | p-value* | Aspiration (+) | Aspiration (-) | p-value** | |
| Cases n. | 40 | 85 | 28 | 57 | ||
| Initial/Recurrence n (%) | 36/4 (90/10) | 67/18 (79/21) | p = 0.14 | 19/9 (68/32) | 48/9 (84/16) | p = 0.09 |
| Smoking never/former n (%) | 29/11 (73/27) | 44/41 (52/48) | p = 0.03* | 13/15 (46/54) | 29/28 (51/49) | p = 0.71 |
| Collapse rate % | 23.3 ± 11.1 | 49.2 ± 17.2* | p < 0.001* | 49.5 ± 17.1 | 49.0 ± 17.4 | p = 0.97 |
| Right/Left n (%) | 17/23 (43/57) | 51/34 (60/40) | p = 0.05* | 13/15 (46/54) | 38/19 (67/33) | p = 0.08 |
| Treatment period (days) | 6.1 ± 2.7 | 6.5 ± 2.7 | p = 0.31 | 10.8 ± 10.6 | 5.4 ± 1.7* | p < 0.001** |
| Surgical treatment n (%) | 5 (13) | 37 (43.5) | p < 0.001* | 19 (67.9) | 18 (31.6) | p = 0.002** |
Data are presented as mean ± SD; *Treatment with bed rest vs. chest drainage; **Aspiration (+) vs. aspiration (-).