Table 4.

Clinical features of PD with RBD patients

	Present study	Sixel-Doring 2014	Yoritaka 2009	Vibha 2011	Romenets 2012	Sommerauer 2014	Rolinski 2014
Patients(n)	141	158	150	134	98	59	475
RCP	6	no	b	b	no	no	5
RBD (%)	21.28	51.27	–	19.4	–	–	47.2
Male pro	–	–	+	–	+	–	+
older	–	–	+	–	+	–	–
MMSE	+	–	–	–	no	no	+
PDSS	+	no	no	+	no	no	a
Depression/anxiety	+	no	no	–	+	no	+
Dementia	–	no	–	no	ex	no	+
Hallucination	+	no	–	+	–	no	+
N-Tremor prominent	–	–	–	–	+	–	–
Axial/limb ratio	–	–	no	no	–	no	+
Constipation	+	no	+	no	–	no	+
Hyposmia	–	–	no	no	–	no	–
OH	+	no	–	no	+	no	+
PSG	N	Y	N	N	Y	Y	N

-: no difference, +: significant difference

Ex: dementia patient was excluded

Male pro Male prominent

No: no data

^aRolinski use Epworth Sleeping Scale instead of PDSS, difference is significant

^bYoritaka and Vibha use minimum clinical criteria of ICSD for RBD diagnosis instead

N No

N-tremor prominent Non-tremor prominent

OH Orthostatic hypotension

Y Yes

RCP RBDSQ cutoff points

Overall motor symptoms and signs were similar but we found significant difference between the two groups in many aspects of non-motor symptoms, including MMSE performance, visual hallucinations, depression, anxiety, orthostatic hypotension and constipation. Except for constipation, these results are consistent with most previous studies