Table 2.
Two multivariate analysis models of overall survival in gastric cancer patients
| Variables | Hazard ratio | 95 % CI | P value |
|---|---|---|---|
| (a) 6th AJCC N staging system (−2 log likelihood: 1548.021; linear trend χ 2: 1501.231; AIC value: 2591.3) | |||
| Age at surgery | 1.025 | 0.748–1.598 | 0.652 |
| Tumor location | 0.984 | 0.548–1.746 | 0.985 |
| Histological grade | 0.745 | 0.624–1.348 | 0.015 |
| Lauren’s classification | 0.864 | 0.521–1.681 | 0.312 |
| The 6th N stage (AJCC) | 1.256 | 0.894–1.612 | 0.007 |
| (b) 7th AJCC N staging system (−2 log likelihood: 1541.013; linear trend χ 2: 1498.564; AIC value: 2601.4) | |||
| Age at surgery | 1.101 | 0.809–1.494 | 0.884 |
| Tumor location | 1.003 | 0.756–1.319 | 0.731 |
| Histological grade | 0.639 | 0.517–1.214 | 0.021 |
| Lauren’s classification | 0.931 | 0.611–1.306 | 0.424 |
| The 7th N stage (AJCC) | 1.481 | 1.112–2.031 | 0.011 |
95 % CI 95 % confidence interval, AJCC American Joint Committee on Cancer, AIC Akaike information criterion, N node