Idiopathic REM Sleep Behavior Disorder: Implications for the Pathogenesis of Lewy Body Diseases

Figure 2

The relation between the OSIT-J score and the delayed H/M ratio of ¹²³I-MIBG uptake in patients with iRBD (the red circle), PD (the green square), and controls (the blue triangle). Broken line (vertical): cut-off value set at 8.5 by OSIT-J to distinguish between iRBD or PD and controls. Broken line (horizontal): cut-off value set at 2.03 by ¹²³I-MIBG to distinguish between iRBD or PD and controls. OSIT-J: Odor Stick Identification Test for Japanese; H/M: heart-to-mediastinum; ¹²³I-MIBG:¹²³I-metaiodobenzylguanidine; OSAS: obstructive sleep apnea syndrome; iRBD: idiopathic rapid eye movement behavior disorder; PD: Parkinson’s disease.