Table 1 Demographics and clinical characteristics of patients
Variables | Mean ± SD or n (%) |
|---|---|
Age, years | 55.81 ± 10.43 |
BMI, kg/m2 | 22.99 ± 2.80 |
Operative time, minutes | 136.77 ± 50.99 |
Sex | |
 Male | 190 (51.9) |
 Female | 176 (48.1) |
Highest level of education | |
 Middle school and below | 174(47.5) |
 Above middle school | 192(52.5) |
Annual income | |
 Low annual income (< 100,000 RMB) | 316(86.3) |
 Hing annual income (≥ 100,000 RMB) | 50(13.7) |
Smoking history | |
 No | 234 (63.9) |
 Yes | 132(36.1) |
Drinking history | |
 No | 276(75.4) |
 Yes | 90(24.6) |
ASA physical status classification | |
 I | 166(45.4) |
 ≥ II | 200(54.6) |
Tumour pathological type | |
 Adenocarcinoma | 306(83.6) |
 Non-adenocarcinoma | 60(16.4) |
Tumour pathological stage | |
 Early stage (0–I) | 239(65.3) |
 Advanced stage (II–IV) | 127(34.7) |
Postoperative maximum complication grade | |
 None or I | 307(83.9) |
 ≥ II | 59(16.1) |
Charlson Comorbidity Index | |
 0 | 115(31.4) |
 1–5 | 251(68.6) |
Surgical approach | |
 Video-assisted thoracoscopic surgery | 301(82.2) |
 Open surgery | 65(17.8) |
Lymphadenectomy | |
 Systematic lymph node dissection | 146(39.9) |
 Non-systematic lymph node dissection | 220(60.1) |
Number of chest tubes | |
 One | 254(69.4) |
 Two | 112(30.6) |