Follow-up arrangements.
| Observation period | ||||||
| Preoperative 1 week | Postoperative 1 month | Postoperative 3 months | Postoperative 6 months | Postoperative 9 months | Postoperative 12 months | |
| Patient Informed Consent | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ |
| Previous Surgery | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ |
| ASA Class | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ |
| ECOG Scale | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ |
| Weight | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Blood routine test | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| CRP | ✓ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Tumour markers | ✓ | ✗ | ✓ | ✓ | ✓ | ✓ |
| CT Scan | ✓ | ✗ | ✗ | ✓ | ✗ | ✓ |
| Endoscopy | ✓ | ✗ | ✓ | ✗ | ✗ | ✓ |
| EORTC QLQ-C30 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| QLQ-STO22 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
ASA, American Society of Anesthesiology; CRP, C reactive protein; CT, computed tomography; ECOG, Eastern Cooperative Oncology Group; EORTC QLQ-C30, The European Organization for Research and Treatment of Cancer Quality of Life Questionnaire; QLQ-STO22, Quality of Life Questionnaire of Stomach.