Intellectual disability is an extremely stigmatizing condition and involves utilization of large
public health resources, but most data about its burden is based on studies conducted in
developed countries. The aim of this meta-analysis was to collate data from published
literature and estimate the prevalence of intellectual disability across all such studies. The
review includes studies published between 1980 and 2009, and includes data from
populations that provided an overall estimate of the prevalence of intellectual disability. Meta …