Table 2

Clinical and Demographic features of the Sample


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)




*Post hoc Test p < .05; **Post hoc Test p .01; ***Post hoc Test p < .001

Note: ADHD = attention-deficit/hyperactivity disorder; TD = typically developing group; CD = conduct disorder; ODD = oppositional defiant disorder.

Sinzig et al. Child and Adolescent Psychiatry and Mental Health 2008 2:4   doi:10.1186/1753-2000-2-4