Nearly one in three adolescents (31.9%) met criteria for an anxiety disorder, with rates for individual disorders ranging from 2.2% for GAD to 19.3% for specific phobia. All anxiety disorder subtypes were more frequent in females (the greatest sex difference being observed for PTSD). The aggregate category of any anxiety disorder was stable across age groups, but considerable variance was observed by disorder subtype. In particular, the prevalence of PTSD, panic disorder, social phobia and GAD showed modest but consistent increases with age. Severe anxiety disorders were present in 8.3% of the total sample, representing all individuals with panic disorder or agoraphobia, a moderate proportion of individuals with GAD (54.5%) or PTSD (30%), and only a small proportion of individuals with social phobia (14.3%), SAD (7.9%) and specific phobia (3.1%); yielding prevalence rates of 1.3% for social phobia, and 0.6% for SAD and specific phobia, respectively.
