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However, RRBs have not been deeply characterised in children and adolescents with DS.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p>The study encompassed a cohort of 151 participants aged 4 to 18\u00a0years with DS. RRBs were assessed utilising the Repetitive Behaviour Scale\u2010Revised. Additionally, data pertaining to cognitive and adaptive functioning, linguistic abilities, sleep patterns and emotional\/behavioural issues were gathered.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Self\u2010injurious behaviours were reported less frequently whereas parents most commonly endorsed items related to behaviours associated with the need for sameness and ritualistic behaviours. We observed very few gender differences, whereas some age\u2010related differences emerged, with adolescents exhibiting higher scores in items related with higher\u2010level RRBs. The analysis of the association between RRBs and clinical features revealed that RRBs were associated with parent\u2010reported sleep difficulties, as well as with internalising and externalising problems. We also observed a negative correlation with IQ whereas associations with adaptive skills emerged mainly for lower\u2010level RRBs, such as motor stereotypies. Finally, RRBs were negatively associated with linguistic abilities, both expressive and receptive.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>RRBs in children and adolescents with DS are of significant clinical interest due to their associations with various clinical dimensions. Therefore, psychological and neuropsychiatric assessment should include an accurate evaluation of RRBs for young people with DS.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jir.13179","type":"journal-article","created":{"date-parts":[[2024,8,6]],"date-time":"2024-08-06T08:45:31Z","timestamp":1722933931000},"page":"1287-1300","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Characterising repetitive behaviours in children and adolescents with Down syndrome"],"prefix":"10.1111","volume":"68","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8795-7424","authenticated-orcid":false,"given":"E.","family":"Fuc\u00e0","sequence":"first","affiliation":[{"name":"Child and Adolescent Neuropsychiatry Unit Bambino Ges\u00f9 Children's Hospital, IRCCS  Rome Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0877-9691","authenticated-orcid":false,"given":"F.","family":"Costanzo","sequence":"additional","affiliation":[{"name":"Child and Adolescent Neuropsychiatry Unit Bambino Ges\u00f9 Children's Hospital, IRCCS  Rome Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5395-2262","authenticated-orcid":false,"given":"S.","family":"Vicari","sequence":"additional","affiliation":[{"name":"Child and Adolescent Neuropsychiatry Unit Bambino Ges\u00f9 Children's Hospital, IRCCS  Rome Italy"},{"name":"Department of Life Science and Public Health Catholic University of the Sacred Heart  Rome Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,8,6]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10803-018-3648-0"},{"key":"e_1_2_9_3_1","unstructured":"AchenbachT. 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