Risk 95% confidence  
Variable Ratio Interval p value
DISEASE-FREE SURVIVAL    
Age* 1.487 0.421- 4.247 0.458
Tumor stage# 14.692 1.871-115.370 0.001
CD133** 2.632 0.685-10.121 0.159
OVERALL SURVIVAL    
Age* 2.625 1.161-5.931 0.020
Tumor stage# 5.993 2.030-17.691 0.001
CD133** 1.063 0.469-2.409 0.513
*The risk ratio is given as older versus younger patients. #The risk ratio is given as higher versus lower stage tumors. **The risk ratio is given as positive versus negative tumors
Table 2: Contribution of various potential prognostic factors to overall survival by Cox regression analysis in oral squamous cell carcinoma patients.