Table 3.

Assessment scores of non-motor symptoms in patients with late onset depressive disorder (LOD) and healthy controls (HC)

Assessment	LOD (n=36)*	HC (n=30)*	P value
RBDSQ mean (SD)	4.3 (3.2)	2.1 (2.1)	0.001
RBD1Q “yes” n (%)	10 (27.8)	2 (6.7)	0.02
SCOPA-AUT mean (SD)	14.9 (8.7)	7.7 (4.9)	<0.001
PDSS mean (SD)	98.1 (24.4)	127.6 (13.1)	<0.001
UPSIT mean (SD)	30.7 (5.7)	29.5 (6.6)	0.43
MoCA mean (SD)	26.0 (3.6)	26.5 (2.7)	0.51
FAB mean (SD)	17.1 (1.1)	17.0 (1.3)	0.85
LARS mean (SD)	−23.3 (9.6)	−27.0 (4.7)	0.04
PHQ-9 mean (SD)	9.1 (6.3)	1.4 (1.9)	0.02
HADS-D mean (SD)	7.1 (4.6)	1.2 (1.0)	<0.001
HADS-A mean (SD)	9.6 (5.1)	2.8 (2.8)	<0.001

Independent samples t test, Mann-Whitney U test and Fisher’s exact.

*Three LOD did not complete the Frontal Assessment Battery (FAB) and one HC did not complete the PDSS.

HADS, Hospital Anxiety and Depression Scale; HADS-A, HADS anxiety subscale; HADS-D, HADS depression subscale; LARS, Lille Apathy Rating Scale; MoCA, Montreal Cognitive Assessment; PDSS, Parkinson’s Disease Sleep Scale; PHQ-9, Patient Health Questionnaire-9; RBD1Q, REM Sleep Behaviour Disorder Single-Question Screen; RBDSQ, The REM Sleep Behaviour Disorder Screening Questionnaire; SCOPA-AUT, Scales for Outcomes in Parkinson’s Disease-Autonomic; UPSIT, University of Pennsylvania Smell Identification Test.