Table 3.
Univariable Cox regression analysis for associations between clinicopathologic characteristics and OS in the whole study cohort (n = 376)
| Variables | Number | HR | 95% CI | P values |
|---|---|---|---|---|
| Age (years) | ||||
| ≥ 50 | 192 (51.1%) | 1.019 | 0.799–1.300 | 0.877 |
| < 50a | 184 (48.9%) | 1.000 | ||
| Gender | ||||
| Men | 180 (47.9%) | 0.993 | 0.778–1.267 | 0.955 |
| Womena | 196 (52.1%) | 1.000 | … | … |
| Pathological type of primary tumor | ||||
| PAC/TAC | 112 (29.8%) | 1.122 | 0.797–1.579 | 0.509 |
| PDAC | 180 (47.9%) | 1.115 | 0.815–1.526 | 0.495 |
| SRC/MACa | 84 (22.3%) | 1.000 | … | … |
| Lauren classifications | ||||
| Intestinal | 130 (34.6%) | 1.125 | 0.873–1.451 | 0.363 |
| Non-intestinala | 246 (65.4%) | 1.000 | … | … |
| T stage of primary tumor | ||||
| T1 | 95 (25.3%) | 1.005 | 0.611–1.654 | 0.984 |
| T2 | 112 (29.8%) | 1.508 | 0.933–2.437 | 0.094 |
| T3 | 133 (35.4%) | 1.515 | 0.946–2.428 | 0.084 |
| T4a | 36 (9.6%) | 1.000 | … | … |
| Gastrectomy | ||||
| Total | 178 (47.3%) | 0.899 | 0.705–1.147 | 0.392 |
| Subtotala | 198 (52.7%) | 1.000 | … | … |
| Lymphovascular invasion | ||||
| Yes | 195 (51.9%) | 1.482 | 1.159–1.895 | 0.002 |
| Noa | 181 (48.1%) | 1.000 | … | … |
| Clinical restage | ||||
| Locoregional recurrence | 140 (37.2%) | 0.968 | 0.725–1.291 | 0.823 |
| Distant metastasis | 96 (25.6%) | 0.344 | 0.249–0.476 | < 0.001 |
| Nonea | 140 (37.2%) | 1.000 | … | … |
| Postsurgical adjuvant treatment | ||||
| Yes | 220 (58.5%) | 1.552 | 1.207–1.997 | 0.001 |
| Noa | 156 (41.5%) | 1.000 | … | … |
| PET finding | ||||
| Positive | 236 (62.8%) | 2.850 | 2.161–3.758 | < 0.001 |
| Negativea | 140 (37.2%) | 1.000 | … | … |
Note. HR hazard ratio, CI confidence interval, PAC papillary adenocarcinoma, TAC tubular adenocarcinoma, PDAC poorly differentiated adenocarcinoma, SRC signet-ring cell carcinoma, MRC mucinous adenocarcinoma, PET positron emission tomography. a, Reference group. Data in parentheses are percentages of corresponding variables