Stereopsis impairment is associated with decreased color perception and worse motor performance in Parkinson’s disease

Table 6 Paired comparison of motor function and visual function in 16 Parkinson’s disease patients taking vs not taking medications ^a

Data parameters	Off medication (n = 8) (mean ± SD)	On medication (n = 9) (mean ± SD)	t	P-value
H&Y stage	2.11 ± 0.50	1.94 ± 0.52	1.902	0.110
UPDRS part III score	27.37 ± 13.01	10.24 ± 3.51	3.680	0.009^b
TAN (PPT scores)	35.74 ± 8.65	44.33 ± 6.57	-3.78	0.007^b
TES	89.24 ± 30.74	60.43 ± 30.55	2.764	0.025^c
PES (red)	12.43 ± 6.53	9.87 ± 7.95	1.114	0.376
PES (green)	23.14 ± 9.34	12.56 ± 8.12	2.545	0.027^c
PES (blue)	35.49 ± 18.12	29.01 ± 17.50	1.227	0.290
PES (purple)	12.45 ± 7.88	10.67 ± 8.54	0.711	0.574
Stereopsis (LG)	6.33 ± 1.82	6.64 ± 2.07	-1.023	0.377

^aH&Y, Hoehn and Yahr; LG, Limited grade; MMSE, Mini Mental State Examination; MoCA, Montreal Cognitive Assessment; PES, Partial error score; PPT, Purdue Pegboard Test; TAN, Total average number; TES, Total error score; UPDRS, Unified Parkinson’s Disease Rating Scale. ^bP < 0.05; ^cP < 0.01.

ISSN: 2047-783X