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Background  Obesity is a major public health concern internationally and this study aimed to measure the prevalence of obesity in adults with intellectual disabilities in comparison with general population data, and examine the factors associated with obesity.

Methods  This was a crosssectional study of all adults with intellectual disabilities, in a defined geographical area, in the context of a primary care health screening programme. A total of 945 adults with intellectual disabilities were involved, all of whom were living in the community. Body mass index (BMI), demographic characteristics, socioeconomic deprivation, level of intellectual disabilities and various health parameters were measured.

Results  Overall, 39.3% of women and 27.8% of men were obese, compared with 25.1% of women and 22.7% of men in the comparison general population. The mean BMI of women with intellectual disabilities (28.8 …