Intracystic glucose is superior to carcinoembryonic antigen in diagnosing mucinous pancreatic cysts in genomic era: Systematic review and meta-analysis

Figure 5 Fagan plots. A and B: Fagan nomograms illustrating the impact of intracystic glucose (IG) (A) and carcinoembryonic antigen (CEA) (B) on post-test probability, assuming a pre-test probability of 60.6%. The solid red arrows represent the shift in probability after a positive test, while dashed grey arrows represent the shift after a negative test, increasing post-test probability to 90% and 94% for positive IG and CEA, respectively, and reducing it to 11% and 41% for negative results. The legend reports the assumed prior probability (Prior Prob), the positive and negative likelihood ratios (LR_Positive and LR_Negative), and the corresponding post-test probabilities for positive and negative test results (Post_Prob_Pos and Post_Prob_Neg). CEA: Carcinoembryonic antigen.