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Table 4 Coefficient of contingency (C value) among tumor markers

From: CA724 predicts overall survival in locally advanced gastric cancer patients with neoadjuvant chemotherapy

Markers     C value P value
pre-CEA   +   
pre-CA199 104 96 0.169 0.005
+ 22 46   
pre-CA125 71 62 0.177 0.015
+ 17 34   
pre-CA199   +   
pre-CA125 109 27 0.230 0.001
+ 29 22   
pre-CA724 115 25 0.205 0.002
+ 52 30   
post-CEA   +   
post-CA199 152 57 0.125 0.052
+ 16 13   
post-CA125 67 20 0.185 0.014
+ 50 34   
post-CA724 85 27 0.133 0.069
+ 45 26   
post-CA199   +   
post-CA125 82 5 0.130 0.089
+ 71 11   
diff-CEA   +   
diff-CA199 45 47 0.150 0.024
+ 44 86   
diff-CA125 32 41 0.136 0.098
+ 22 50   
diff-CA199   +   
diff-CA125 40 32 0.165 0.045
+ 28 44   
diff-CA724 36 36 0.203 0.008
+ 27 64   
  1. Only results with P ≤ 0.1 were listed
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