[Retracted] The Importance of Early Identification for Parkinson’s Disease Patients with Postural Instability and Gait Disturbance

Figure 2

Receiver operating characteristic (ROC) curve analysis of risk factors for PD-PIGD patients (abbreviations: RBDSQ, rapid eye movement sleep behavior disorder (RBD) screening questionnaire; PIGD, postural instability and gait difficulty dominant; UPDRS, Unified Parkinson’s Disease Rating Scale; LED, levodopa equivalent dose). Larger area under the ROC curve indicates better prediction ability.