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Table 3 Univariate Analysis; significant factors

From: Brachytherapy of stage II mobile tongue carcinoma. Prediction of local control and QOL

   Relapse free survival Overall survival Cervical metastasis free survival
Variables   UHR P value UHR P value UHR P value
Growth pattern        
  Superficial vs. exophytic 2.84 <0.001 5.16 0.03 1.49 0.15
  Superficial vs. invasive 3.92 <0.001 7.54 0.01 3.39 <0.001
Tumor thickness (mm)        
  ≤5 vs. 6–10 1.76 0.19 2.08 0.15 2.87 <0.001
  ≤5 vs. 10–15 3.02 0.02 2.80 0.08 3.10 <0.001
  ≤5 vs. > 15 3.57 <0.001 3.93 0.01 5.02 <0.001
Brachytherapy source        
  192Ir vs. 137Cs 1.25 0.76 1.29 0.81 3.74 <0.001
  192Ir vs. 226Ra 0.81 0.52 1.22 0.61 1.23 0.33
Brachytherapy dose (Gy)        
  ≤70vs. > 70 1.24 0.54 1.24 0.61 1.03 0.91
UHR: unadjusted hazard ratio        
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