By contrast, the discrepancy between the control and PD groups was low in the CEA (AUC: 0.654, sensitivity = 0.38, specificity = 0.873), albumin (AUC: 0.643, sensitivity = 0.62, specificity = 0.636), and TC (AUC: 0.620, sensitivity = 0.60, specificity = 0.673). This evidence concerns the gene CEACAM5 and Parkinson disease.