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. 2008 Aug 21;178(9):929–938. doi: 10.1164/rccm.200803-387OC

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Copyright © 2008, American Thoracic Society

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Figure 4. — Receiver operating characteristic (ROC) curves of gene combinations and FEV₁. ROC curves depict the fraction of true-positive (sensitivity) and false-positive (1 − specificity) values plotted for RNA transcripts and FEV₁% predicted. A perfect test is indicated by an area under curve = 1. A test with no discriminatory value has an area under curve = 0.50. (A) ROC curves for the development cohort depicting discriminatory capacity of FEV₁% predicted alone versus FEV₁ with CD64 and ADAM9 transcripts (c-statistic = 0.88). (B) ROC curves for validation group comparing FEV₁% predicted alone with FEV₁ plus CD64 and CD36 transcripts (c-statistic = 0.80).

Figure 4. — Receiver operating characteristic (ROC) curves of gene combinations and FEV₁. ROC curves depict the fraction of true-positive (sensitivity) and false-positive (1 − specificity) values plotted for RNA transcripts and FEV₁% predicted. A perfect test is indicated by an area under curve = 1. A test with no discriminatory value has an area under curve = 0.50. (A) ROC curves for the development cohort depicting discriminatory capacity of FEV₁% predicted alone versus FEV₁ with CD64 and ADAM9 transcripts (c-statistic = 0.88). (B) ROC curves for validation group comparing FEV₁% predicted alone with FEV₁ plus CD64 and CD36 transcripts (c-statistic = 0.80).

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