Meta analysis finds prevalence of intellectual disability higher in low and middle income group countries.

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This meta analysis collated data from published literature between 1980 and 2009 to estimate the prevalence of intellectual disability across all such studies.

The authors state the prevalence of intellectual disability across all 52 studies included was 10.37/1000 population. Estimates varied according to income group of country of origin, age-group of study population  and study design.

The authors found prevalence higher among studies based on children/adolescents, compared to those on adults and higher prevalence was also found in low and middle income group countries.

Prevalence of intellectual disability: A meta-analysis of population-based studies, Maulik P et al,  in Research in Developmental Disabilities, 32. 2. 419-436

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John Northfield

After qualifying as a social worker, John worked in community learning disability teams before getting involved in a number of long-stay hospital closure programmes, working to develop individual plans for people moving into their own homes. He worked for BILD, helping to develop the Quality Network and was editorial lead for the NHS electronic library learning disabilities specialist collection. This led him to found the Learning Disabilities Elf site with Andre Tomlin as a way of making the evidence accessible to practitioners in health and social care. Most recently he has worked as part of Mencap's national quality team and also been involved in a number of national website developments, including the General Medical Council's learning disabilities site.

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