For more than 10 years, the CDD (Autism and Developmental Disability Monitoring) program of the Centers for Disease Control and Prevention (CDC) in the United States has been monitoring the epidemiological progression of conditions Autism Spectrum Disorder (ASD), with indicators analyzed from all health records and school records of 8-year-olds from 14 American communities (over 8%) of the 8-year-old population of American children) (CDC, 20123). The group of researchers, which has analyzed these annual data since 2002, notes that the prevalence rate increased by 78% between 2002 and 2008. In March 2012, the prevalence rate was 1 in 88 children (CDC 20124). . In May 2013, the same researchers report that the rate now stands at 1 child out of 50. Figures in other countries give this:
In Cameroon: poorly known statistics; we use international numbers (1 per cent),
The highlights of these observations are:
• four times more boys are diagnosed with ASD;
• more children are identified as infants (before the age of 3), but the majority of them are not diagnosed until the age of 4;
• In general, children with more severe symptoms are diagnosed earlier than children with more subtle traits.
• the majority of children diagnosed with ASD have no intellectual disability (62%).
• ASD is now recognized as the most common neurological disorder (Geneva Center for Autism, 2006) worldwide, affecting families of all races, ethnicities and social strata.