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Table 6 Summary of results of survival analysis by Kaplan-Meier test

From: A study of Smad4, Smad6 and Smad7 in Surgically Resected Samples of Pancreatic Ductal Adenocarcinoma and Their Correlation with Clinicopathological Parameters and Patient Survival

Variables Groups No. of patients Median 95% Confidence Interval(CI) Significance
     Lower Upper  
Age < 50 5 5.000 ± 2.191 0.706 9.294 0.211
  ≥ 50 20 9.000 ± 2.225 4.639 13.361  
Sex Male 13 10.000 ± 1.754 6.562 13.438 0.127
  Female 12 6.000 ± 1.732 2.605 9.395  
Grade G1 13 7.000 ± 1.198 4.651 9.349 0.228
  G2 12 10.000 ± 1.125 7.795 12.205  
Stage I+II 10 10.000 ± 2.066 5.951 14.049 0.031*
  III+IV 15 7.000 ± 0.949 5.141 8.859  
Tumor size < 3 cm 19 9.000 ± 0.933 7.172 10.828 0.842
  ≥ 3 cm 6 6.000 - -  
Margin status Negative 22 9.000 ± 1.038 6.966 11.034 0.999
  Positive 3 6.000 - -  
pSmad4 Absent/Low 20 6.000 ± 0.745 4.539 7.461 0.003*
  Moderate/High 5 13.000 ± 2.191 8.706 17.294  
pSmad6 Absent/Low 14 7.000 ± 0.926 5.185 8.815 0.141
  Moderate/High 11 10.000 ± 1.477 7.105 12.895  
pSmad7 Absent/Low 20 7.000 ± 2.236 2.617 11.383 0.633
  Moderate/High 5 10.000 ± 3.286 3.559 16.441  
  1. *The significant values are highlighted.