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Table 4 Comparison of Parkinson’s disease patients regarding normal vs abnormal stereopsis a

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

Data parameters PD patients (N = 45)
  Normal stereopsis (n = 26) (mean ± SD) Abnormal stereopsis (n = 19) (mean ± SD) P-value AdjustedP-value
Age (yr) 64.58 ± 8.31 66.53 ± 10.79 0.497  
H&Y stage 2.04 ± 0.73 2.40 ± 0.59 0.089  
UPDRS part III score 20.81 ± 7.48 31.16 ± 16.54 0.018b 0.112
UPDRS total score 37.15 ± 13.96 49.74 ± 24.14 0.033b  
TAN (PPT scores) 37.41 ± 9.48 30.00 ± 9.61 0.014b 0.575
MMSE score 28.04 ± 1.74 26.78 ± 4.22 0.187  
MoCA score 24.96 ± 3.70 22.67 ± 6.22 0.150  
Line connection 0.66 ± 0.48 0.61 ± 0.50 0.692  
Copy cube 0.76 ± 0.44 0.55 ± 0.51 0.083  
Drawing clock 2.31 ± 0.97 2.06 ± 1.06 0.311  
Disease duration (yr) 6.59 ± 5.34 6.61 ± 3.34 0.989  
TES 110.85 ± 65.19 170.00 ± 97.63 0.019b  
PES (red) 27.23 ± 23.31 41.32 ± 29.33 0.08  
PES (green) 23.96 ± 14.61 40.74 ± 17.17 0.001c 0.027b
PES (blue) 39.04 ± 25.08 53.95 ± 36.00 0.108  
PES (purple) 20.54 ± 14.78 34.00 ± 27.23 0.039b 0.409
  1. aH&Y, Hoehn and Yahr; MMSE, Mini Mental State Examination; MoCA, Montreal Cognitive Assessment; PD, Parkinson’s disease; 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. For the adjusted P-value, a logistic regression model was used with stereopsis (normal or abnormal) as the dependent variable.