Table 2. Univariate and multivariate survival analyses for evaluating the influence of the number of LNs retrieved on CSS in node negative gastric cancer.
| Variable | 5-year RCCS | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|---|
| Log rank χ2 test | P | HR (95% CI) | P | ||
| Sex | 1.864 | 0.172 | NI | ||
| Male | 73.1% | ||||
| Female | 75.8% | ||||
| Age | 37.652 | < 0.001 | < 0.001 | ||
| ≤ 60 | 79.1% | Reference | |||
| > 60 | 72.0% | 1.593 (1.383–1.834) | |||
| Race | 34.396 | < 0.001 | 0.001 | ||
| Caucasian | 71.3% | Reference | |||
| Black | 75.8% | 0.918 (0.763–1.104) | 0.362 | ||
| Others | 81.3% | 0.740 (0.631–0.869) | < 0.001 | ||
| Grade | 57.923 | < 0.001 | < 0.001 | ||
| High/Moderate | 78.8% | Reference | |||
| Poor/Anaplastic | 69.3% | 1.380 (1.219–1.564) | < 0.001 | ||
| Unknown | 81.0% | 0.995 (0.745–1.330) | 0.974 | ||
| Histotype | 3.390 | 0.066 | NI | ||
| Adenocarcinoma | 74.8% | ||||
| Mucinous/signet ring cell | 71.4% | ||||
| Tumor size (mm) | 149.109 | < 0.001 | 0.007 | ||
| < 20 | 84.4% | Reference | |||
| 20–50 | 70.9% | 1.240 (1.042–1.476) | 0.015 | ||
| > 50 | 62.9% | 1.402 (1.154–1.703) | 0.001 | ||
| Unknown | 74.4% | 1.295 (1.048–1.599) | 0.016 | ||
| T Stage | 511.603 | < 0.001 | < 0.001 | ||
| T1 | 86.3% | Reference | |||
| T2 | 78.5% | 1.495 (1.223–1.828) | < 0.001 | ||
| T3 | 61.4% | 2.770 (2.341–3.277) | < 0.001 | ||
| T4a | 52.2% | 3.731 (3.058–4.553) | < 0.001 | ||
| T4b | 41.2% | 5.619 (4.324–7.302) | < 0.001 | ||
| Tx | 26.1% | 4.941 (2.812–8.680) | < 0.001 | ||
| No. of LNs | 72.026 | < 0.001 | < 0.001 | ||
| 1–4 | 64.8% | Reference | |||
| 5–13 | 72.5% | 0.684 (0.589–0.794) | < 0.001 | ||
| > 13 | 79.4% | 0.501 (0.428–0.587) | < 0.001 | ||
NI: not included in the multivariate survival analysis.