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Table 3 Comparison of visual function in Parkinson’s disease patients and controls (adjusted for age) a

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

Visual function measurements PD patients (n = 45) Controls(n = 50) AdjustedP-value
Color perception (Farnsworth-Munsell 100-Hue Test score)    
 TES (mean ± SD) 135.82 ± 84.78 84.26 ± 41.73 0.0001b
 PES (red) (mean ± SD) 33.18 ± 26.65 20.14 ± 14.40 0.001c
 PES (green) (mean ± SD) 31.04 ± 17.66 19.90 ± 13.00 0.0001b
 PES (blue) (mean ± SD) 45.33 ± 30.71 29.74 ± 14.35 0.001c
 PES (purple) (mean ± SD) 26.22 ± 21.74 14.48 ± 10.35 0.0001b
Stereopsis    
 LG (mean ± SD) 5.16 ± 2.59 7.10 ± 1.89 0.0001b
 Abnormal (%) 42.2% 12.0% 0.001c
  1. aLG, Limited grade; PD, Parkinson’s disease; PES, Partial error score; TES, Total error score. bP < 0.001; cP < 0.05.