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

Table 3

Sensitivity and specificity of OSIT-J and cardiac ¹²³I-MIBG scintigraphy.

	OSIT-J score	Early H/M ratio	Delayed; H/M ratio
iRBD patients (𝑛=30)
Cut-off	8.5	2.30	2.03
Sensitivity	90.0%	95.0%	95.0%
Specificity	83.3%	86.7%	96.7%
PD patients (𝑛=38)
Cut-off	8.5	2.30	2.03
Sensitivity	90.0%	95.0%	95.0%
Specificity	92.1%	71.1%	71.1%

iRBD: idiopathic REM sleep behavior disorder, PD: Parkinson’s disease, OSIT-J: Odor Stick Identification Test for Japanese, ¹²³I-MIBG: ¹²³I-metaiodobenzylguanidine, H/M: heart-to-mediastinum.