Table 3. Univariable and multivariable analysis of prognostic factors for RFS after propensity score matching.
| Variable | No. of patients | Univariable | Multivariable | |||
|---|---|---|---|---|---|---|
| HR (95% CI) | P-value | HR (95% CI) | P-value | |||
| Age (yr) | ||||||
| <70 | 313 | 1 | - | |||
| ≥70 | 35 | 1.12 (0.48–2.61) | 0.793 | |||
| Sex | ||||||
| Female | 111 | 1 | - | |||
| Male | 237 | 1.28 (0.72–2.28) | 0.395 | |||
| Surgical approach | ||||||
| Laparoscopy | 246 | 1 | - | 1 | - | |
| Open | 102 | 1.82 (1.08–3.07) | 0.024 | 1.62 (0.95–2.74) | 0.075 | |
| Body mass index (kg/m2) | 1.05 (0.96–1.15) | 0.279 | - | - | ||
| Type of operation | ||||||
| Distal gastrectomy | 245 | 1 | - | |||
| Total gastrectomy | 103 | 1.34 (0.78–2.30) | 0.296 | |||
| Complications within 30 days (grade II or more) | ||||||
| No | 337 | 1 | - | |||
| Yes | 11 | 1.14 (0.28–4.69) | 0.852 | |||
| Histological type | ||||||
| Differentiated | 105 | 1 | - | 1 | - | |
| Undifferentiated | 243 | 2.03 (1.05–3.92) | 0.035 | 2.05 (1.06–3.96) | 0.033 | |
| Stage | ||||||
| II | 155 | 1 | - | 1 | - | |
| III | 193 | 2.83 (1.55–5.17) | 0.001 | 2.61 (1.42–4.80) | 0.002 | |
| Time to CTx (wk) | ||||||
| ≤4 | 174 | 1 | - | 1 | - | |
| >4 | 174 | 1.04 (0.62–1.74) | 0.889 | 1.05 (0.62–1.75) | 0.866 | |
RFS = relapse-free survival; HR = hazard ratio; CI = confidence interval; CTx = chemotherapy.