Table 1 Population characteristics and data completeness
Total study populations (n=3653) | Missing data (%) | |
|---|---|---|
Age | 61 (53–67) | 0 |
Sex | ||
Male | 2487 (68.08%) | 0 |
Female | 1166 (31.92%) | |
BMI | 23 (20.9–25.1) | 0.27 |
Tobacco use | ||
Non-smoker | 1532 (60.58%) | 30.19 |
Previous smoker | 842 (33.02%) | |
Active smoker | 176 (6.90%) | |
Alcohol | ||
Non-drinker | 1822 (71.65%) | 30.38 |
Previous drinker | 613 (24.10%) | |
Active drinker | 108 (4.25%) | |
Ischemic heart disease | 129 (3.53%) | 0 |
Hypertension | 757 (20.72%) | 0 |
Diabetes | 338 (9.25%) | 0 |
Respiratory system disease | 31 (0.85%) | 0 |
ASA score | ||
1 | 66 (1.81%) | 0.05 |
2 | 3160 (86.55%) | |
3 | 411 (11.26%) | |
4 | 14 (0.38%) | |
Tumor stage (pTNM) | ||
1 | 947 (25.92%) | 0 |
2 | 1138 (31.15%) | |
3 | 1541 (42.18%) | |
4 | 27 (0.75%) | |
Procedure type | 0 | |
Gastrectomy | 2054 (56.22%) | |
Colorectomy | 1599 (43.77%) | |
Procedure approach | ||
Laparoscopic | 1708 (46.76%) | 0 |
Open | 1945 (53.24%) | |
Intraoperative blood loss (ml) | 100 (50–150) | 0.19 |
Intraoperative transfusion | 249 (6.82%) | 0 |
Operating duration | 3 (2.42–3.83) | 0 |
Anastomotic leakage | 57 (1.56%) | 0 |
In-hospital mortality | 2 (0.05%) | 0 |