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Table 4 Univariable and multivariable Cox proportional hazard regression analyses for prognostic factors in Surveillance Epidemiology and End Results cohort

From: Postoperative survival effect of the number of examined lymph nodes on esophageal squamous cell carcinoma with pathological stage T1–3N0M0

  Univariable analysis Multivariable analysis
HR 95% CI P-Value HR 95% CI P-Value
Sex
 Male 1 reference   1 reference  
 Female 0.843 0.578–1.228 0.374 0.798 0.544–1.171 0.798
Age (years)
  ≤ 60 1 reference   1 reference  
  > 60 0.872 0.581–1.310 0.510 0.909 0.590–1.399 0.664
Tumor length (continuous) 1.008 0.999–1.017 0.099    
NELNs
  ≤ 15 1 reference   1 reference  
  > 15 0.661 0.442–0.989 0.044 0.650 0.431–0.979 0.039
Tumor differentiation
 Well-moderate 1 reference   1 reference  
 Poor 1.192 0.806–1.763 0.378 1.128 0.756–1.684 0.554
pT stage
 T1 1 reference   1 reference  
 T2-T3 1.792 1.216–2.642 0.003 1.861 1.256–2.756 0.002
Tumor Location
 Upper-middle 1 reference     
 Lower 0.973 0.662–1.429 0.888    
Race
 White patients 1 reference   1 reference  
 Other patients 1.035 0.694–1.544 0.865 0.984 0.647–1.497 0.984
  1. NELNs the number of examined lymph nodes; Cox regression’s method was Enter selection