Validation of the Non-Motor Symptoms Scale for Parkinson’s Disease of Persian Version

Table 3

Construct convergent validity of the Non-Motor Symptoms Scale in PD patients.

Variables	NMSS total	Cardiovascular	Sleep/fatigue	Mood/cognition	Perceptual problems/hallucinations	Attention/memory	Gastrointestinal	Urinary	Sexual function	Miscellaneous
		rs	rs	rs	rs	rs	rs	rs	rs	rs
Age	−0.06	0.03	−0.17	−0.04	−0.15	0.1	0.08	0.06	−0.06	−0.23
Age at onset of disease	−0.1	0.02	−0.2	−0.09	−0.12	0.1	0.02	0.01	−0.09	−0.27
Disease duration	0.15	0.03	0.08	0.1	0.04	−0.07	0.14	0.15	0.08	0.14
H&Y	0.21	0.1	−0.01	0.1	0.13	0.2	0.2	0.07	0.007	0.2
UPDRSI	0.84	0.48	0.66	0.7	0.36	0.37	0.41	0.54	0.26	0.41
UPDRSII	0.58	0.38	0.37	0.4	0.26	0.26	0.47	0.32	0.24	0.4
UPDRSIII	0.36	0.23	0.18	0.2	0.2	0.25	0.31	0.2	0.13	0.23
LEDD	0.33	0.2	0.26	0.1	0.2	0.01	0.26	0.2	0.16	0.36
SCOPA-AUT	0.66	0.44	0.5	0.4	0.21	0.16	0.5	0.58	0.41	0.22
SCOPA-sleep	0.6	0.24	0.71	0.4	0.27	0.13	0.25	0.32	0.21	0.26
SCOPA-PC	0.41	0.28	0.26	0.3	0.42	0.4	0.2	0.17	0.12	0.17
SCOPA-M	0.47	0.35	0.27	0.3	0.28	0.22	0.46	0.24	0.19	0.26
SCOPA-COG	−0.3	−0.1	−0.2	−0.1	−0.02	−0.5	−0.06	−0.13	0.01	−0.06
MMSE	−0.3	−0.1	−0.1	−0.2	−0.04	−0.59	0.01	−0.1	−0.02	−0.06
BDI	0.71	0.38	0.52	0.7	0.36	0.26	0.37	0.38	0.36	0.31
PDQ-8	0.61	0.31	0.46	0.5	0.32	0.27	0.38	0.3	0.26	0.38

r_s: spearman’s correlation coefficient; significant correlations are highlighted in bold. NMSS: Non-Motor Symptoms Scale; H&Y: Hoehn and Yahr; UPDRS: Unified Parkinson’s disease Rating Scale; LEDD: Levodopa Equivalent Daily Dose; SCOPA: Scales for outcomes in Parkinson’s Disease; AUT: autonomic; PC: psychiatric complications; M: motor; COG: cognition; MMSE: mini-Mental State Examination; BDI: Beck’s Depression Inventory; PDQ-8: Parkinson’s Disease Questionnaire-8 questions.