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Table 2 Comparison of neuropsychological test performance scores for each genotype group

From: Dopamine transporter 3'UTR VNTR genotype is a marker of performance on executive function tasks in children with ADHD

 

9/10 genotype

10/10 genotype

F statistic and p value

Wisconsin Card Sorting Test

   

Perseverative errors raw score

45 ± 22.5

40.7 ± 19.6

F = 1.29; p = 0.26

Non perseverative errors raw score

20.4 ± 12.6

19.1 ± 12.6

F = 0.11; p = 0.74

Total errors raw score

24.7 ± 15.4

22.4 ± 14.2

F = 0.63; p = 0.43

Trials to complete first category

23.9 ± 22.2

21.9 ± 18.5

F = 0.32; p = 0.57

Number of categories completed

4.1 ± 1.7

4.6 ± 1.5

F = 3.17; p = 0.076

WISC-III

   

Arithmetic

8.5 ± 3.0

9.4 ± 2.6

F = 3.51; p = 0.063

Digit span

7.6 ± 2.3

8.6 ± 2.3

F = 6.28; p = 0.013 *

FFDI

8.0 ± 2.3

9.0 ± 2.0

F = 7.13; p = 0.008 **

SOPT (4 levels of difficulty)

   

Level 1 number of errors

2.3 ± 1.6

1.9 ± 1.4

 

Level 2 number of errors

3.7 ± 2.1

3.0 ± 2.0

 

Level 3 number of errors

4.6 ± 2.6

3.7 ± 2.3

 

Level 4 number of errors

5.9 ± 3.6

5.0 ± 3.0

 

Repeated measures statistic for the SOPT

  

F = 5.00; p = 0.026 *

TOL (12 levels of difficulty)

   

Level 1 score

8.2 ± 0.9

8.3 ± 0.9

 

Level 2 score

8.0 ± 1.5

8.3 ± 1.1

 

Level 3 score

7.6 ± 1.3

7.7 ± 1.1

 

Level 4 score

6.1 ± 2.6

6.8 ± 1.9

 

Level 5 score

6.5 ± 1.6

6.8 ± 1.4

 

Level 6 score

4.3 ± 3.0

4.8 ± 2.7

 

Level 7 score

4.5 ± 2.9

4.7 ± 3.0

 

Level 8 score

5.2 ± 2.7

5.2 ± 2.6

 

Level 9 score

6.3 ± 1.8

6.4 ± 1.7

 

Level 10 score

2.8 ± 2.8

3.0 ± 2.8

 

Level 11 score

4.0 ± 2.9

4.8 ± 2.4

 

Level 12 score

4.4 ± 2.7

4.8 ± 2.5

 

Repeated measures statistic for the TOL

  

F = 6.90; p = 0.009 **

  1. Values are mean ± SD. Statistical analyses for the SOPT and TOL were implemented using a repeated measures design. For this reason, only an overall F statistic is available for each of these two tests.
  2. * → Statistical trend (0.011 < p value < 0.05).
  3. ** → Statistically significant (p value < 0.011).