Fig. 3

Diagnostic value of lncRNAs in CCA. a The optimal combination of H19, C3P1, AC005550.3, PVT1, and LPAL2 to distinguish the CCA tissue from the normal ones (p < 0.001,left); and the AUC of PVP was up to 0.8828 [95% CI: 0.7441–1.021, P < 0.001], with 93.75% sensitivity and 81.25% specificity, at the cutoff point of − 0.2884 (right). b Another 11 pairs of patient samples (11 cancerous and 11 adjacent tissues) were further validate the selected lncRNAs . c An AUC value of 0.8430 [95% CI: 0.6766–1.009, P < 0.001], as well as 90.91% sensitivity and 72.73% specificity was revealed when these test data was plugged into the PVP equation