The prevalence of autistic spectrum disorders in people using a community learning disabilities service

The prevalence of autistic spectrum disorders in people using a large urban learning disabilities service was examined using a questionnaire-based method. Both statutory and independent service providers were surveyed and a total of 174 people with either a confirmed or a suspected autistic spectrum disorder were identified. Current and historical factors are discussed which suggest that the resulting estimation that 10 percent of service users have an autistic spectrum disorder represents the lowest estimate of prevalence in this population. The implications for service provision and development are discussed.