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Table 1 Baseline demographics and characteristics of patients before and after matching

From: Three-port single-intercostal versus multiple-intercostal thoracoscopic lobectomy for the treatment of lung cancer: a propensity-matched analysis

  All patients p value Propensity-matched Patients p value
Single intercostal (n = 190) Multi-intercostal (n = 432) Single intercostal (n = 186) Multi-intercostal (n = 186)
Age(years) 59.2 (8.7) 61.3 (9.1) 0.060 59.7 (8.3) 59.9 (8.5) 0.847
Sex    0.221    0.834
Male 106 (55.8%) 218 (50.5%)   104 (55.9%) 106 (57.0%)  
Female 84 (44.2%) 214 (49.5%)   82 (44.1%) 80 (43.0%)  
FEV1 (L) 2.31 (0.43) 2.38 (0.52) 0.193 2.31 (0.43) 2.31 (0.49) 0.986
Smoking history    0.245    0.832
Yes 74 (38.9%) 156 (36.1%)   74 (39.8%) 72 (38.7%)  
No 106 (61.1%) 276 (63.9%)   112 (60.2%) 114 (61.3%)  
BMI(kg/m2) 22.7 (2.8) 23.1 (3.0) 0.313 22.7 (2.8) 23.4 (2.8) 0.112
Tumor size (cm) 2.1 (1.8) 2.4 (1.7) 0.238 2.1 (1.8) 2.2 (1.5) 0.787
Adenocarcinoma 168 (88.4%) 362 (83.8%) 0.135 164 (88.2%) 156 (83.9%) 0.232
Location    0.020    0.321
LUL 32 (16.8%) 70 (16.2%)   28 (15.1%) 28 (15.1%)  
LLL 24 (12.6%) 98 (22.7%)   24 (12.9%) 32 (17.2%)  
RUL 76 (40.0%) 126 (29.2%)   76 (40.9%) 58 (31.2%)  
RML 16 (8.4%) 40 (9.3%)   16 (8.6%) 22 (11.8%)  
RLL 42 (22.1%) 98 (22.7%)   42 (22.6%) 46 (24.7%)  
Pathologic stage    0.050    0.389
I a 140 (73.7%) 278 (64.4%)   136 (73.1%) 133 (71.5%)  
I b 6 (3.2%) 28 (6.5%)   6 (3.2%) 8 (4.3%)  
II a 2 (1.1%) 16 (3.7%)   2 (1.1%) 8 (4.3%)  
II b 20 (10.5%) 46 (10.6%)   20 (10.8%) 14 (7.5%)  
III a 18 (9.5%) 60 (13.9%)   18 (9.7%) 20 (10.8%)  
III b 4 (2.1%) 4 (0.9%)   4 (2.2%) 3 (1.6%)  
  1. Data are presented as n (%) or mean (SD). FEV1 = forced expiratory volume in 1 second; BMI body mass index
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