Only 2 former studies have assessed patients with HA using SCID-II. One had a small sample size of 21 psychiatric outpatients, and 74% of these patients were found to have comorbid PD compared to 52% for other psychiatric outpatients in Greece. Here the most prevalent PD for HA were histrionic and obsessive-compulsive personality disorders [39]. The other study included 42 patients with HA and no comorbid OCD or Social Phobia recruited from a community in USA. This study found, that 40% with HA had comorbid PD, and the most prominent types were paranoid, obsessive-compulsive and avoidant PD. Here the group of HA were compared to groups of patients with OCD and Social Phobia, and they found no significant difference between the prevalence of PD with HA compared to the prevalence of PD with either of these 2 anxiety disorders [40].