Table 1: Demographic and Clinical Characteristics of the Study Groups.

From: Aldehyde dehydrogenase 2 is associated with cognitive functions in patients with Parkinson’s disease

 rs671(GG) (n = 76)rs671(AG) and (AA) (n = 63)Statisticp Value
meanSDmeanSD
Age (years)62.999.62864.339.1252216.0000.451
Gender (female/male)23/5325/38χ2 = 1.3520.163
Education (years)11.324.43111.564.617U = 2294.50.665
Age at Onset (years)56.169.60757.438.840U = 2210.00.436
Disease duration (years)6.8284.6056.9046.308U = 2224.00.470
Levodopa equivalent dose673.413535.4641.266487.333U = 2253.00.755
Hoehn and Yahr stage2.290.9952.361.079U = 2021.50.723
I23.9%28.8%χ2 = 3.0690.381
II38.0%23.7%  
III23.9%30.5%  
IV14.1%16.9%  
  1. Abbreviations: SD, standard deviation.