Table 3. Operative data and harvested lymph node numbers at different station.
| Variables | OE (n=77) | VAMIE (n=144) | RAMIE (n=91) | P value |
|---|---|---|---|---|
| Operating time, mean ± SD (min) | 299.38±57.98 | 321.13±57.21 | 318.02±53.90 | 0.021 |
| Blood loss, mean ± SD (mL) | 289.61±355.00 | 200.49±59.54 | 215.49±125.40 | 0.004 |
| R0 resection, n (%) | 75 (97.40) | 144 (100.00) | 91 (100.00) | 0.060 |
| Hospital stay | 16.66±9.30 | 18.73±13.29 | 16.57±8.00 | 0.241 |
| Number of dissected lymph node, mean ± SD | ||||
| Total number | 24.09±10.77 | 23.07±10.18 | 22.84±8.37 | 0.680 |
| Cervical | 1.25±4.30 | 0.42±1.70 | 0.29±1.99 | 0.040 |
| Upper mediastinum | 4.33±3.61 | 5.63±3.88 | 6.22±4.10 | 0.006* |
| Middle mediastinum | 7.81±4.89 | 7.20±4.69 | 6.34±3.74 | 0.103 |
| Lower mediastinum | 1.77±2.32 | 1.74±2.18 | 1.90±1.87 | 0.850 |
| Abdominal | 8.94±5.55 | 8.10±4.77 | 8.13±5.53 | 0.481 |
| Right RLN nodes | 2.14±1.95 | 2.57±2.08 | 2.74±2.03 | 0.155 |
| Left RLN nodes | 1.26±2.27 | 1.95±2.67 | 2.35±3.00 | 0.032* |
| Achievement rates, n (%) | ||||
| Right RLN nodes | 59 (76.62) | 123 (85.42) | 78 (85.71) | 0.190 |
| Left RLN nodes | 29 (37.66) | 75 (52.08) | 54 (59.34) | 0.018* |
*, Statistically significant. OE, open esophagectomy; VAMIE, video-assisted minimally invasive esophagectomy; RAMIE, robotic-assisted minimally invasive esophagectomy; SD, standard deviation; RLN, recurrent laryngeal nerve.