From: Anxiety disorders in children with Williams syndrome, their mothers, and their siblings: Implications for the etiology of anxiety disorders
Type of anxiety disorder
N
%
Population Prevalence (%)a
Social phobia
15
11.4
15.7
GAD
31
23.5
8.1**
OCD
3
2.3
1.6
Specific phobia
27
20.5
17.9
PTSD
5
3.8
10.9*
Panic disorder
4
3.0
7.7