Table 4 Comparison among different severity levels of asymptomatic PSP
| Â | Â | Total | Mild | Moderate | Severe | Â | Â | |||
|---|---|---|---|---|---|---|---|---|---|---|
|  |  |  | n = 22 | (%) | n = 12 | (%) | n = 9 | (%) | p-value |  |
Right or left | ||||||||||
| Â | right | 23 | 9 | (40.9%) | 9 | (75.0%) | 5 | (55.6%) | 0.161 | Â |
| Â | left | 20 | 13 | (59.1%) | 3 | (25.0%) | 4 | (44.4%) | Â | Â |
Pleural effusion | ||||||||||
|  | (−) | 30 | 20 | (90.9%) | 9 | (75.0%) | 1 | (11.1%) | <0.001 | *** |
| Â | (+) | 13 | 2 | (9.1%) | 3 | (25.0%) | 8 | (88.9%) | Â | Â |
Previous pneumothorax | ||||||||||
|  | (−) | 32 | 15 | (68.2%) | 9 | (75.0%) | 8 | (88.9%) | 0.486 |  |
| Â | (+) | 11 | 7 | (31.8%) | 3 | (25.0%) | 1 | (11.1%) | Â | Â |
Recalled symptom | ||||||||||
|  | (−) | 38 | 20 | (90.9%) | 10 | (83.3%) | 8 | (88.9%) | 0.804 |  |
| Â | (+) | 5 | 2 | (9.1%) | 2 | (16.7%) | 1 | (11.1%) | Â | Â |
Therapy | ||||||||||
| Â | conservative | 18 | 11 | (50.0%) | 5 | (41.7%) | 2 | (22.2%) | 0.452 | Â |
| Â | invasive | 18 | 8 | (36.4%) | 4 | (33.3%) | 6 | (66.7%) | Â | Â |
| Â | N/A | 7 | 3 | (13.6%) | 3 | (25.0%) | 1 | (11.1%) | Â | Â |