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Table 3 Comparison of tumor biomarkers with an AUC greater than 0.7

From: Auxiliary diagnostic value of tumor biomarkers in pleural fluid for lung cancer-associated malignant pleural effusion

  PF CEA Serum CEA PF/serum CEA PF CYFRA 21-1
Serum CEA  < 0.001
PF/serum CEA  < 0.001 0.885
PF CYFRA 21-1  < 0.001 0.067 0.132
Serum CYFRA 21-1  < 0.001 0.016 0.018 0.188
  1. CEA carcinoembryonic antigen, CYFRA 21-1 cytokeratin 19 fragment, PF pleural fluid, PF/serum PF value divided by serum value