| EOGC | Early-onset gastric cancer |
| LOGC | Late-onset gastric cancer |
| GC | Gastric cancer |
| SRCC | Signet ring cell carcinoma |
| IGC | Intestinal type gastric cancer |
| DGC | Diffuse type gastric cancer |
| IQR | Interquartile range |
| CI | Confidence interval |
| ADT | Arbeitsgemeinschaft Deutscher Tumorzentren/Society of German Tumor Centers—Network for Care, Quality and Research in Oncology |