Table 3.
Multivariate survival analysis of the patients following operation for gastric cancer before and after PSM
| Variable | Before PSM | After PSM | ||||
|---|---|---|---|---|---|---|
| HR | 95%CI | P | HR | 95%CI | P | |
| Age (> 60 vs ≤ 60 years) | 1.315 | 1.189–1.455 | < 0.001 | - | - | - |
| Tumor size (> 5 vs ≤ 5 cm) | 1.202 | 1.063–1.361 | 0.003 | 1.338 | 1.016–1.761 | 0.038 |
| Type of gastrectomy | 0.013 | - | - | - | ||
| Proximal vs distal | 1.198 | 1.018–1.411 | 0.030 | - | - | - |
| Total vs distal | 1.398 | 1.115–1.753 | 0.004 | - | - | - |
| T stage | < 0.001 | - | - | |||
| T2 vs T1 | 1.505 | 1.171–1.935 | 0.001 | - | - | - |
| T3 vs T1 | 1.644 | 1.282–2.108 | < 0.001 | - | - | - |
| T4a vs T1 | 2.406 | 1.906–3.038 | < 0.001 | - | - | - |
| T4b vs T1 | 2.670 | 2.021–3.527 | < 0.001 | - | - | - |
| N stage | < 0.001 | - | - | < 0.001 | ||
| N1 vs N0 | 1.464 | 1.215–1.764 | < 0.001 | 3.034 | 1.272–7.237 | 0.012 |
| N2 vs N0 | 1.911 | 1.599–2.283 | < 0.001 | 2.683 | 1.153–6.242 | 0.022 |
| N3a vs N0 | 3.116 | 2.620–3.707 | < 0.001 | 5.764 | 2.520–13.186 | < 0.001 |
| N3b vs N0 | 3.842 | 3.152–4.682 | < 0.001 | 7.578 | 3.286–17.472 | < 0.001 |
| Chemotherapy (present vs absent) | 0.667 | 0.598–0.745 | < 0.001 | 0.759 | 0.621–0.929 | 0.007 |
| TD (presence vs absence) | 1.286 | 1.118–1.478 | 0.001 | 1.268 | 1.057–1.522 | 0.011 |
Abbreviations: HR hazard ratio, CI confidence interval, TD tumor deposit, PSM propensity score matching