Parkinson’s Disease

Research Article

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

Table 2

Multiple regression analysis of OSIT-J related parameters for Parkinson's disease () and iRBD ().


	PD		iRBD
		value		value

Age	−0.348	0.037	0.016	0.936
Sex	0.404	0.033	0.080	0.701
Disease duration, month	0.147	0.591	−0.314	0.377
MMSE (>24)	0.189	0.230	0.184	0.377
Hoehn and Yahr stage	−0.013	0.940	N/A	N/A
UPDRS motor subset	0.079	0.674	−0.153	0.517
Motor phenotype	−0.239	0.177	N/A	N/A
LEU	0.074	0.969	N/A	N/A
Smoking atatus	0.007	0.798	−0.040	0.834
Delayed H/M ratio (¹²³I-MIBG)	0.399	0.015	−0.274	0.183

	0.493		0.184

iRBD: idiopathic REM sleep behavior disorder, PD: Parkinson’s disease, OSIT-J: Odor Stick Identification Test for Japanese, MMSE: Mini-Mental State Examination, UPDRS: Unified Parkinson’s Disease Rating Scale, LEU: daily levodopa-equivalent unit, H/M: heart-to-mediastinum, and ¹²³I-MIBG: ¹²³I-metaiodobenzylguanidine.
^aStandardized regression coefficients.
^bCoefficient of determination.
Bold values indicate statistically significant values. N/A: not aplicable.