Invalid Self-Assessment of Olfactory Functioning in Parkinson’s Disease Patients May Mislead the Neurologist

Figure 1

Receiver operating characteristic (ROC) curve of the visual analogue scale (VAS) for PD patients. VAS ranging from 0 to 100% was used to evaluate the subjective olfactory acuity. The ROC curve demonstrates sensitivity (true positive rate) and 1  −  specificity (false positive rate) of the VAS according to an objective diagnosis of hyposmia or normosmia.