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Table 2 Postoperative outcomes of propensity score-unmatched and matched patients

From: Short-term outcomes of robot-assisted minimally invasive esophagectomy for esophageal cancer: a propensity score matched analysis

Postoperative outcomes Before matching After matching
RAMIE (n = 27) VAMIE (n = 88) P value RAMIE (n = 27) VAMIE (n = 27) P value
Operation time (minutes) 349 ± 45 294 ± 52 < 0.001 349 ± 45 285 ± 66 < 0.001
Blood loss (mL) 118 ± 71 165 ± 107 0.030* 119 ± 72 158 ± 82 0.062*
Number of harvested LNs 20 ± 7 18 ± 6 0.214* 20 ± 7 19 ± 5 0.420*
Postoperative hospital stay (day) 13.8 ± 2.0 14.1 ± 4.2 0.548* 13.8 ± 2.0 12.8 ± 2.7 0.128
Overall complication (at least one) [n (%)] 10 (37.0) 37(42.0) 0.643 10 (37.0) 9 (33.3) 0.776
RLN injury [n (%)] 4 (14.8) 14 (15.9) 0.891 4 (14.8) 3 (11.1) 1.000†
Pulmonary complication [n (%)] 5 (18.5) 16 (18.2) 0.968 5 (18.5) 2 (7.4) 0.224
Arrhythmia [n (%)] 1 (3.7) 8 (9.1) 0.362 1 (3.7) 0 1.000†
Anastomotic leak [n (%)] 3 (11.1) 9 (10.2) 0.763 3 (11.1) 1 (3.7) 0.351†
Chylothorax [n (%)] 0 1 (1.1) 1.000† 0 1 (3.7) 1.000†
Bleeding [n (%)] 1 (3.7) 2 (2.3) 0.556† 1 (3.7) 1 (3.7) 1.000†
Delayed gastric emptying [n (%)] 1 (3.7) 7 (8.0) 0.448 1 (3.7) 0 1.000†
90-day mortality [n (%)] 0 2 (2.3) 1.000† 0 1 (3.7) 1.000†
  1. Data were presented as mean ± standard deviation for continuous variables or number (%) for categorical data
  2. *Mann-Whitney U test; †Fisher’s exact test
  3. RAMIE robot-assisted minimally invasive esophagectomy, VAMIE video-assisted minimally invasive esophagectomy, RLN recurrent laryngeal nerve