Research Article
The Association between Survival and the Pathologic Features of Periampullary Tumors Varies over Time
Table 3
Cox regression multivariate analysis between pathologic features and overall survival.
| Covariate |
Number of patients | Hazard ratio | 95% CI | |
| Model A | | | | | Age | 206 | 1.02 | 1–1.04 | 0.019 | Tumor size | 1.31 | 1.16–1.48 | <0.001 | Margin status | 2.12 | 1.5–3.01 | <0.001 | Model B | | | | | Age | 206 | 1.02 | 1–1.04 | 0.018 | Tumor size | 1.35 | 1.19–1.52 | <0.001 | Margin status | 1.69 | 1.17–2.44 | 0.005 | Lymphovascular invasion | 1.96 | 1.37–2.82 | <0.001 | Model C | | | | | Age | 206 | 1.02 | 1–1.04 | 0.014 | Tumor size | 1.3 | 1.15–1.47 | <0.001 | Margin status | 1.58 | 1.09–2.29 | 0.016 | Perineural invasion | 2.19 | 1.44–3.32 | <0.001 | Model D | | | | | Age | 206 | 1.02 | 1.01–1.04 | 0.008 | Tumor size | 1.27 | 1.12–1.43 | <0.001 | Margin status | 1.75 | 1.23–2.5 | 0.002 | LN status | 2.44 | 1.64–3.64 | <0.001 | Model E | | | | | Age | 206 | 1.02 | 1–1.04 | 0.012 | Tumor size | 1.28 | 1.13–1.45 | <0.001 | Margin status | 1.95 | 1.37–2.76 | <0.001 | LNR (%) | 1.02 | 1.01–1.03 | <0.001 |
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LN: lymph nodes; LNR (lymph node ratio) = (number of positive LN)/(total LN removed) * 100.
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