Comparative study of CEA and CA19-9 in esophageal, gastric and colon cancers individually and in combination (ROC curve analysis)
<b>Objective:</b>To determine the clinical serum levels of carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9), individually and in combination, for the diagnosis of 50 healthy subjects and 150 cases of esophageal, gastric, and colon cancers.<br/><b>Methods:...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
China Anti-Cancer Association
2013-09-01
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| Series: | Cancer Biology & Medicine |
| Subjects: | |
| Online Access: | http://www.cancerbiomed.org/index.php/cocr/article/view/622 |
| Summary: | <b>Objective:</b>To determine the clinical serum levels of carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9), individually and in combination, for the diagnosis of 50 healthy subjects and 150 cases of esophageal, gastric, and colon cancers.<br/><b>Methods:</b>The sensitivities of the two markers were compared individually and in combination, with specificity set at 100%. Receiver operating characteristic (ROC) curves were plotted.<br/><b>Results:</b>Serum CEA levels were significantly higher in cancer patients than in the control group. The sensitivity of CEA was determined:in esophageal cancer, sensitivity=28%, negative predictive value (NPV)=61.72%, and AUC=0.742 (SE=0.05), with a significance level of <i>P</i><0.0001; in gastric cancer, sensitivity=30%, NPV=58.82%, and AUC=0.734 (SE=0.05), with a significance level of <i>P</i><0.0001; in colon cancer, sensitivity=74%, NPV=79.36%, and AUC=0.856 (SE=0.04), with a significance level of <i>P</i><0.0001. The sensitivity of CA19-9 was also evaluated:in esophageal cancer, sensitivity=18%, NPV=54.94%, and AUC=0.573 (SE=0.05), with a significance level of <i>P</i>=0.2054. In gastric cancer, sensitivity=42%, NPV=63.29%, and AUC=0.679 (SE=0.05), with a significance level of <i>P</i><0.0011. In colon cancer, sensitivity=26%, NPV=57.47%, and AUC=0.580 (SE=0.05), with a significance level of <i>P</i>=0.1670. The following were the sensitivities of CEA/CA19-9 combined:in esophageal cancer, sensitivity=42%, NPV=63.29%, SE=0.078 (95% CI:0.0159-0.322); gastric cancer, sensitivity=58%, NPV=70.42%, SE=0.072 (95% CI:-0.0866-0.198); and colon cancer, sensitivity=72%, NPV=78.12%, SE=0.070 (95% CI:0.137-0.415).<br/><b>Conclusion:</b>CEA exhibited the highest sensitivity for colon cancer, and CA19-9 exhibited the highest sensitivity for gastric cancer. Combined analysis indicated an increase in diagnostic sensitivity in esophageal and gastric cancer compared with that in colon cancer. |
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| ISSN: | 2095-3941 2095-3941 |