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Table 1 Characteristics of patients who underwent non-intubated uni-port video-assisted thoracoscopic wedge resection with or without chest tube drainage

From: Tubeless uniportal thoracoscopic wedge resection with modified air leak test and chest tube drainage

  Before propensity score matching After propensity score matching
Tubeless group (n = 55) Drainage group (n = 211) P-value Tubeless group (n = 55) Drainage group (n = 55) P-value
Gender    0.54    0.78
 Male 23 (41.8%) 92 (43.6%)   23 (41.8%) 24 (43.6%)  
 Female 32 (58.2%) 109 (56.4%)   32 (58.2%) 31 (56.4%)  
Age 44.8 ± 11.1 45.9 ± 10.8 0.36 44.8 ± 11.1 45.1 ± 10.5 0.84
Smoking history (no. of smokers) (%) 17 (30.9%) 83 (39.3%) 0.19 17 (30.9%) 19 (34.5%) 0.45
FEV1 (L) 2.49 ± 0.51 2.53 ± 0.69 0.42 2.49 ± 0.51 2.51 ± 0.41 0.73
FEV1, % of prediction 115.3 ± 12.5 112.6 ± 15.5 0.57 115.3 ± 12.5 113.4 ± 13.7 0.76
Body mass index (kg/m2) (median and range) 22.9 ± 2.7 23.6 ± 3.3 0.29 22.9 ± 2.7 23.2 ± 2.1 0.58
ASA status class    0.83    1.00
 I 49 (89.0%) 192 (90.1%)   49 (89.0%) 49 (89.0%)  
 II 6 (11.0%) 19 (9.9%)   6 (11.0%) 6 (11.0%)  
Comorbidity    0.25    0.79
 Hypertension 2 (3.6%) 12 (5.6%)   2 (3.6%) 2 (3.6%)  
 Diabetes mellitus 2 (3.6%) 3 (1.4%)   2 (3.6%) 1 (1.8%)  
 Other 1 (1.8%) 4 (1.9%)   1 (1.8%) 2 (3.6%)  
Maximal lesion size (mm) 9.8 ± 3.3 8.8 ± 3.9 0.21 9.8 ± 3.3 9.3 ± 3.7 0.62
Nodule depth (mm) 6.3 ± 4.7 7.1 ± 5.0 0.32 6.3 ± 4.7 6.7 ± 4.5 0.43
Lesion location    0.34    0.55
 Right upper lobe 15 (27.2%) 58 (27.4%)   15 (27.2%) 15 (27.3%)  
 Right lower lobe 14 (25.4%) 48 (22.8%)   14 (25.4%) 12 (21.8%)  
 Left upper lobe 13 (23.6%) 59 (30.0%)   13 (23.6%) 16 (29.1%)  
 Left lower lobe 13 (23.6%) 46 (21.8%)   13 (23.6%) 12 (21.8%)  
  1. ASA American Society of Anesthesiologists, FEV1 forced expiratory volume in 1 s