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Table 3 NAA/Cr ratio measurements and WCST scores in alcoholics and controls

From: Effect of metabotropic glutamate receptor 3 genotype on N-acetylaspartate levels and neurocognition in non-smoking, active alcoholics

Parameter Alcoholic group ( n  = 49) Control group ( n  = 45)  t   df   P 
Left Prefrontal GM 1.59 ± 0.13 1.66 ± 0.12 −2.59 92 0.011a
Left Prefrontal WM 1.58 ± 0.12 1.70 ± 0.07 −6.03 80 <0.001b
Left Parietal GM 1.53 ± 0.09 1.55 ± 0.07 −1.24 91 0.220
Left Parietal WM 1.56 ± 0.10 1.56 ± 0.06 −0.33 77 0.746
Cerebellar vermis 0.94 ± 0.06 0.94 ± 0.06 −0.07 90 0.946
   F = 8.12,v1 = 5,v2 = 86,P < 0.001c  
Number of corrects 30.37 ± 3.73 37.78 ± 2.37 −11.58 82 <0.001b
Perseverative errors 11.49 ± 3.39 6.04 ± 2.44 8.87 92 <0.001b
Random errors 6.18 ± 2.64 4.18 ± 1.34 4.70 72 <0.001b
Categories completed 2.08 ± 1.59 4.93 ± 0.65 −11.52 65 <0.001b
   F = 37.74,v1 = 4,v2 = 89,P < 0.001d  
   F = 17.18,v1 = 9,v2 = 82,P < 0.001e  
  1. a Value is statistically significant (P < 0.05).
  2. b Value is statistically significant (P < 0.001).
  3. c Alcoholic group was different from controls for the variables of NAA/Cr levels.
  4. d Alcoholic group was different from controls for the variables of WCST scores.
  5. e Alcoholic group was different from controls for the variables including all the NAA/Cr levels and WCST scores.