5 The subjects included in the study were aged 15 to 54 years and not receiving inpatient psychiatric treatment. They were interviewed by nonmedical interviewers, using a revised version of CIDI. This revised edition of CIDI was designed to enable diagnosis according to DSM-III-R criteria, as well as Diagnostic and Statistical Manual of Mental Health Disorders, Fourth Edition 9 (DSM-IV) and the International Statistical Classification of Diseases, Tenth

Revision 10 (ICD-10) criteria. Its aim, which was complementary to that of the EGA study, was not only to evaluate prevalence of psychiatric disorders in the general population, but also to identify certain risk Inhibitors,research,lifescience,medical factors and evaluate psychiatric care needs in inhabitants throughout the USA. Approximately half of the subjects who took part suffered from, or had suffered from, at least one psychiatric event (lifetime prevalence). At the time of the study, a third of the subjects presented an event or had presented an event in the previous Inhibitors,research,lifescience,medical 12 months (12-month prevalence). The most common Inhibitors,research,lifescience,medical diagnoses were major depressive events, alcohol dependence, SP, or simple

phobia. More than half of the diagnosed lifetime events were found in only 14% of the population. This group of patients had past medical history featuring at least in three comorbid pathologies, and it is among this group that the most severe disorders were found. Furthermore, 40% of the subjects who had presented a psychiatric event in their Inhibitors,research,lifescience,medical lifetime had previously received treatment, while only 20% of those who had an event during the previous 6 months had been treated.11 The main feature of the NCS is that prevalence rates for mental disorders in the general population were much higher that those generally found in most previous studies, notably ECA study (Table II), in spite of the fact that the ECA methodology was very similar: Table II. Lifetime prevalence of

psychiatric disorders in the Epidemiological Catchment Area (ECA) survey and the National Comorbidity Inhibitors,research,lifescience,medical Survey (NCS).11 GAD, generalized anxiety disorder; PD, panic disorder; OCD, obsessive-compulsive disorder; SP, social phobia. Use of a semi-structured interview and similar diagnostic criteria (revised CIDI and DSM-III-R in the NCS; and diagnostic interview schedule [DIS] and DSM-III in the ECA). Performed in the general population Bay 11-7085 in North America (nationwide sample of 8000 subjects aged 15 to 54 years in the NCS; and 20 000 subjects ≥18 years from five states in the ECA). Lifetime and 12-month prevalence in both studies. Noninstitutionalized general population in the NCS and general population weighted by institutionalized subjects in the ECA. Adjusted to correct for nonresponder biases in the NCS study. The modest methodological differences between the two R428 mw studies would not even have tended to bias results in any way.