Table 1.
Patient characteristics
| Characteristic | NAS group (n = 54) | RT group (n = 26) | P-value |
|---|---|---|---|
| Sex, male/female (n) | 47/7 | 25/1 | 0.26 |
| Age, median (IQR), years | 20 (17, 28) | 22 (17, 28) | 0.74 |
| Age under 25 years (n) | 35 | 17 | >0.99 |
| BMI, mean (SD), m/kg2 | 19.2 (2.5) | 19.9 (2.4) | 0.26 |
| Smokers/non-smokers (n) | 22/32 | 10/16 | >0.99 |
| Unilateral/bilateral PSP (n) | 47/7 | 16/10 | 0.017 |
| Side, right/left (n) | 33/21 | 11/15 | 0.15 |
| Apical lung blebs (n) | 2 | 24 | <0.001 |
| Area of RAS, median (IQR), cm2 | 7.3 (3.8, 13.6) | 10.3 (6.6, 14.9) | 0.18 |
| Operation time, median (IQR), minutes | 41 (35, 67) | 56 (40, 73) | 0.14 |
| Recurrence (n) | 2 | 10 | <0.001 |
| Treatment for recurrence (n) | |||
| VATS bullectomy | 2 | 6 | |
| VATS suturing | 0 | 2 | |
| Conservative management | 0 | 2 | |
NAS: normal alveolar structure; RT: reticulated trabecula-like structure; IQR: interquartile range; BMI: body mass index; SD: standard deviation; PSP: primary spontaneous pneumothorax; RAS: residual apical space; VATS: video-assisted thoracoscopic surgery