On the contrary, the AUC calculated for the DAT-SPECT parameters did not reveal high values of sensitivity and specificity for the diagnosis of PD in those de novo patients (AUC = 0.539 for right C/O, AUC = 0.542 for left C/O, AUC = 0.545 for right P/O and AUC = 0.564 for left P/O) (See Figure 2). Here, SLC6A3 is linked to Parkinson disease.