TABLE 1.
Clinical characteristics of patients.
| Factors | Training group | Validation group | P-value |
| Age, years | 64.6 ± 10.2 | 64.9 ± 10.7 | 0.698 |
| BMI, kg/m2 | 22.6 ± 3.1 | 22.8 ± 3.0 | 0.522 |
| Gender | 0.060 | ||
| Female | 60 (23.0%) | 87 (30.1%) | |
| Male | 201 (77.0%) | 202 (69.9%) | |
| NRS-2002 score | 0.117 | ||
| 1–2 | 164 (62.8%) | 204 (70.6%) | |
| 3–4 | 78 (29.9%) | 72 (24.9%) | |
| 5 | 19 (7.3%) | 13 (4.5%) | |
| Low SMI | 0.561 | ||
| No | 183 (70.1%) | 196 (67.8%) | |
| Yes | 78 (29.9%) | 93 (32.2%) | |
| Low grip strength | 0.208 | ||
| No | 195 (74.7%) | 202 (69.9%) | |
| Yes | 66 (25.3%) | 87 (30.1%) | |
| Low walking speed | 0.177 | ||
| No | 222 (85.1%) | 257 (88.9%) | |
| Yes | 39 (14.9%) | 32 (11.1%) | |
| Laparoscopic surgery | 0.009 | ||
| No | 189 (72.4%) | 179 (61.9%) | |
| Yes | 72 (27.6%) | 110 (38.1%) | |
| Total gastric resection | 0.662 | ||
| No | 156 (59.8%) | 178 (61.6%) | |
| Yes | 105 (40.2%) | 111 (38.4%) | |
| Combined resection | 0.263 | ||
| No | 233 (89.3%) | 266 (92.0%) | |
| Yes | 28 (10.7%) | 23 (8.0%) | |
| Anastomotic type | 0.251 | ||
| Roux-en-Y | 127 (48.7%) | 130 (45.0%) | |
| Billroth I | 98 (37.5%) | 104 (36.0%) | |
| Billroth II | 36 (13.8%) | 55 (19.0%) | |
| TNM stage | 0.172 | ||
| I | 82 (31.4%) | 112 (38.8%) | |
| II | 52 (19.9%) | 56 (19.4%) | |
| III | 127 (48.7%) | 121 (41.9%) | |
| Postoperative complications | 0.399 | ||
| No | 199 (76.2%) | 228 (79.2%) | |
| Yes | 62 (23.8%) | 61 (20.8%) |
Data shown in the table: Mean ± SD/N (%).
BMI, body mass index; NRS-2002, nutritional risk screening; SMI, skeletal muscle index; TNM, tumor–node–metastasis.