The Health and Social Care Information Centre has said there appears to be an association between hands-on restraint and the administration of anti-psychotic medication on inpatients with learning disabilities.
Kingsley Manning, chair of the HSCIC, said: "The Learning Disabilities Census, and this further analysis, is an important contribution to understanding how episodes such as those seen at Winterbourne View Hospital can be avoided in the future."
Some 40% of the 2,220 given these drugs experienced at least one instance of hands-on restraint compared to 21.5% of the 1,030 who were not given any of this medication. And 78% of service users were subject to the Mental Health Act on census day, compared with 22% classified as informal patients.
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