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Table 3 Possible prognostic factors and relative risks

From: Right versus left transthoracic approach for lymph node-negative esophageal squamous cell carcinoma

Possible prognostic factors P Hazard ratio 95 % Confidence interval
Age 0.003 1.108 1.006–1.030
Smoking history <0.001 1.601 1.273–2.014
Drinking history <0.001 1.687 1.321–2.155
Duration of surgery 0.039 1.002 1.000–1.003
Blood loss during surgery 0.140 1.001 1.000–1.001
Tumor staging <0.001 1.470 1.231–1.755
Tumor location 0.249 0.887 0.724–1.087
Operation approach 0.019 1.101 1.016–1.193
Location of anastomosis 0.081 0.808 0.635–1.026
Method of anastomosis 0.731 0.955 0.733–1.244
Complications 0.132 0.812 0.619–1.065