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Table 2 Clinical and Demographic features of the Sample

From: Inhibition, flexibility, working memory and planning in autism spectrum disorders with and without comorbid ADHD-symptoms

  ASD+ ASD- ADHD TD Group effect Post hoc Scheffé
  (n = 20) (n = 20) (n = 20) (n = 20) F p  
No. (%)        
Gender      2.4 0.8  
-male 19 (94.7) 16 (80.0) 19 (95.0) 14 (70.0)    
-female 1 (5.3) 4 (20.0) 1 (5.0) 6 (30.0)    
Autism diagnosis      0 1.0  
- Asperger syndrome 15 (75.0) 15 (75.0) - -    
- High-functioning autism 5 (25.0) 5 (25.0)      
ADHD subtype      2.0 0.2  
- Combined s. 7 (35.0) - 8 (40.0) -    
- Inattentive only s. 11 (55.0)   11 (55.0)     
-Hyperactive/Impulsive s. 2 (10.0)   1 (5.0)     
Comorbid ODD 9 (45.0) 6 (30.0) 11 (55.0) - 1.3 0.3  
Mean (SD)        
Age at testing (years) 10.9 (3.1) 14.3 (3.0) 12.2 (2.0) 13.1 (3.0) 4.4 0.1 ASD+ < ASD-**
  (6.0–17.0) (8.3–18.9) (7.1–17.6) (7.6–17.6)    
IQ 103 (13.0) 112 (17.7) 98(13.4) 113 (11.9) 5.7 0.01 ADHD < TD**, ASD-**
Min-Max (80–131) (82–146) (80–128) (95–144)    
  1. *Post hoc Test p < .05; **Post hoc Test p .01; ***Post hoc Test p < .001
  2. Note: ADHD = attention-deficit/hyperactivity disorder; TD = typically developing group; CD = conduct disorder; ODD = oppositional defiant disorder.