Table 1.
Baseline demographic data of the benchmark cohort, stratified by type of surgery
| Total Gastrectomy (n = 498) | Distal Gastrectomy (n = 1071) | P | Total (n = 1569) | |
|---|---|---|---|---|
| Age (years), median (i.q.r.) | 54 (47–60) | 55 (48–60) | 0.137 | 55 (48–60) |
| Sex | ||||
| Female | 37.3 | 39.9 | 0.348 | 39.1 |
| Male | 62.7 | 60.1 | 60.9 | |
| BMI (kg/m2), median (i.q.r.) | 23.5 (21.2–25.5) | 23.3 (21.1–25.5) | 0.313 | 23.3 (21.1–25.5) |
| ASA grade | ||||
| I | 51.0 | 70.6 | <0.001 | 64.4 |
| II | 49.0 | 29.4 | 35.6 | |
| World region | ||||
| America | 10.2 | 4.5 | <0.001 | 6.3 |
| East Asia | 45.0 | 79.1 | 68.3 | |
| Europe | 44.8 | 16.4 | 25.4 | |
| pTNM staging | ||||
| 0/I | 37.9 | 65.0 | <0.001 | 56.4 |
| II | 29.7 | 19.2 | 22.6 | |
| III | 32.3 | 15.8 | 21.0 | |
| IV | 0 | 0 | 0 | |
| Tumour localization | ||||
| Cardia/OGJ/fundus | 33.3 | 0 | <0.001 | 10.6 |
| Corpus | 52.0 | 48.3 | 49.5 | |
| Antrum/pylorus | 10.6 | 51.2 | 38.3 | |
| Multiple, whole, linitis plastica | 4.0 | 0.6 | 1.7 | |
| Surgical access | ||||
| Open | 55.6 | 20.4 | <0.001 | 31.5 |
| Laparoscopic | 37.3 | 66.5 | 57.2 | |
| Robotic | 4.4 | 11.9 | 9.5 | |
| Conversion (laparoscopic to open) | 2.6 | 1.3 | 1.7 | |
| Preoperative chemotherapy | 41.0 | 11.6 | <0.001 | 20.9 |
Values are % apart from those for age and BMI. i.q.r., interquartile range; OGJ, oesophagogastric junction.