Table 1. Baseline demographic and clinical characteristics.
| Characteristic | Value |
|---|---|
| Mean age [range], years | 58.3 [49–69] |
| Gender, n (%) | |
| Male | 17 (85.0) |
| Female | 3 (15.0) |
| BMI (mean) | 22.20 |
| Range | 18.49–26.30 |
| ≤25, n (%) | 18 (90.0) |
| >25, n (%) | 2 (10.0) |
| Preoperative complications, n (%) | |
| Hypertension | 3 (15.0) |
| Diabetes | 1 (5.0) |
| Coronary heart disease | 0 (0.0) |
| ASA status | 2 [2–2] |
| Smoking history, n (%) | 13 (65.0) |
| Drinking history, n (%) | 4 (20.0) |
| Tumor location, n (%) | |
| Upper | 2 (10.0) |
| Middle | 13 (65.0) |
| Lower | 5 (25.0) |
| Effect after immunotherapy, n (%) | |
| cCR | 0 (0.0) |
| cPR | 14 (70.0) |
| cSD | 5 (25.0) |
| cPD | 1 (5.0) |
| Objective response rate | 14 (70.0) |
BMI, body mass index; ASA status, The American Society of Anesthesiologists' Physical Status; cCR, clinical complete response; cPR, clinical partial response; cSD, clinical stable disease; cPD, clinical progressive disease.