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Table 1 Sample description (Boys only)

From: Normal response inhibition in boys with Tourette syndrome

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+
  1. 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)
  2. b SDQ = Strength and Difficulties Questionnaire
  3. + p < .1
  4. * p < .05
  5. ** p < .01