Table 3. Multivariate logistic regression analysis for OS before and after PSM.
| Variables | OS before PSM | OS after PSM | |||||
|---|---|---|---|---|---|---|---|
| HR | 95% CI | P value | HR | 95% CI | P value | ||
| LNM+ vs. LNM− | 1.6 | 0.92–2.7 | 0.09 | 1.2 | 0.62–2.3 | 0.60 | |
| Sex (female vs. male) | 0.7 | 0.43–1.2 | 0.17 | 0.44 | 0.19–1 | 0.054 | |
| Age (≥70 vs. <70 years) | 2.1 | 1.3–3.5 | 0.002 | 3 | 1.4–6.3 | 0.004 | |
| Neoadjuvant chemotherapy (no vs. yes) | 2.9 | 0.89–9.2 | 0.07 | 3.9 | 0.86–17 | 0.07 | |
| Comorbidity (no vs. yes) | 1.9 | 1–3.5 | 0.04 | 4 | 1.2–14 | 0.02 | |
| Post-operational complications (no vs. yes) | 2.2 | 1.3–3.6 | 0.001 | 2.4 | 1.2–5 | 0.01 | |
| Operation method (laparoscopic vs. open) | 1.8 | 0.8–4 | 0.16 | 1.1 | 0.39–3.1 | 0.86 | |
| Operative blood loss (≥100 vs. <100 mL) | 2.2 | 1.4–3.6 | 0.001 | 2.8 | 1.4–5.6 | 0.003 | |
| Lymph node dissection (non-D3 vs. D3) | 0.88 | 0.39–2 | 0.76 | 1.6 | 0.61–4.2 | 0.34 | |
| Tumor size (cm) | 1.2 | 1.1–1.3 | 0.003 | 1.3 | 1–1.5 | 0.03 | |
| Lymphatic invasion (no vs. yes) | 1 | 0.57–1.8 | 0.99 | 0.78 | 0.38–1.6 | 0.51 | |
CI, confidence interval; HR, hazard ratio; LNM−, lymph node metastasis negative; LNM+, lymph node metastasis positive; OS, overall survival; PSM, propensity score matching.