Table 1

Sample description (Boys only)

Measure
Healthy
Comparison
N = 15
Tourette
Syndrome
N = 20
ANOVA

Mean (SD)
Mean (SD)
F(1,33)

Age (months)
153.3 (19.2)
150.0 (18.6)
0.3
Estimated Total IQ
107 (10.9)
108 (13.9)
0.1
TSSS a
[0 (0)]
1.9 (1.6)
27.5**
Duration of tics (years) a
[0 (0)]
5.7 (2.3)
128.3**
SDQ b



     Self rated



     - Total problems
7.3 (4.0)
9.8 (5.5)
2.3
     - Emotional symptoms
1.0 (1.3)
2.1 (1.5)
4.7*
     - Conduct Problems
1.6 (1.1)
1.9 (1.4)
0.4
     - Hyperactivity
3.3 (1.8)
3.7 (2.7)
0.3
     - Peer Problems
1.4 (1.2)
2.2 (2.3)
1.3
     - Prosocial Behavior
7.5 (1.5)
7.6 (1.9)
0.1
     Parent rated



     - Total problems
4.9 (3.1)
10.0 (6.0)
8.8**
     - Emotional symptoms
0.9 (1.0)
1.7 (2.0)
1.8
     - Conduct Problems
0.7 (0.7)
2.4 (1.7)
12.3**
     - Hyperactivity
3.1 (2.0)
4.3 (2.4)
2.1
     - Peer Problems
0.3 (0.6)
1.7 (2.0)
7.0*
     - Prosocial Behavior
8.3 (1.2)
7.1 (2.1)
3.7+

a All children in the Healthy comparison group scored zero on the TSSS and Duration of tics. Thus, it was tested whether the score of the Tourette syndrome group differed from zero (df = 1, 19)

b SDQ = Strength and Difficulties Questionnaire

+ p < .1

* p < .05

** p < .01

Roessner et al. Behavioral and Brain Functions 2008 4:29   doi:10.1186/1744-9081-4-29