Clinical association between coagulation indicators and bone metastasis in patients with gastric cancer

Figure 1 Receiver operating characteristic analysis for the prediction of bone metastasis. A-H: Area under the receiver operating characteristic (ROC) curve analysis indicated the diagnostic power of carcinoembryonic antigen (CEA) (A), age (B), erythrocyte level (C), globulin (D), prothrombin time (PT) (E), activated partial thromboplastin time (APTT) (F), fibrin degradation product (FDP) (G) and prediction probability (H) for bone metastasis. Prediction probability was obtained by binary logistic regression of CEA, age, erythrocyte level, globulin, PT, APTT and FDP. The area under the ROC curve of the prediction probability was 0.879 with a 95% confidence interval of 0.841-0.917. ROC: Receiver operating characteristic; FDP: Fibrin degradation product; PT: Prothrombin time; APTT: Activated partial thromboplastin time; CEA: Carcinoembryonic antigen.