Prevalence of psychiatric disorders in adults with moderate to profound learning disabilities

Widely varying rates for the prevalence of psychiatric disorder have been reported in the previous published literature. The aims of this study were to describe the prevalence of psychiatric disorders in a random sample of adults with moderate to profound learning disabilities living in the community, and to explore the socio‐clinical factors associated with psychiatric disorders.A process of active case finding was undertaken to identify adults with learning disabilities. A random sample of 240 was taken of whom 121 were found to have moderate to profound learning disabilities at interview. Information was collected on socio‐demographics, service use, physical health, medication use, and life events. Standardised instruments were used to assess psychiatric symptoms, problem behaviour, and severity of learning disabilities. Diagnoses were generated using four diagnostic systems: clinical, DC‐LD, DCR‐10 and DSM‐IV.Higher rates of psychiatric disorder are reported than in previous published studies in the general population and in studies with people with learning disabilities living in the community. Further investigation of the effect of diagnostic system on prevalence rates, and associations of psychiatric disorder are warranted.