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This role encompasses early detection of developmental concerns, guiding families through the diagnostic process, coordinating care with other HCPs and educators, and ensuring that appropriate interventions are accessed. A comprehensive review of the medical history, completion of a thorough physical assessment, and the initiation of a genomic investigation\u2014depending on clinical indications and available resources\u2014are the mainstays for assessing children with GDD\/IDD. Metabolic testing is only recommended in specific circumstances, which are briefly described.<\/jats:p>","DOI":"10.1093\/pch\/pxag032","type":"journal-article","created":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T11:42:24Z","timestamp":1775043744000},"page":"682-689","source":"Crossref","is-referenced-by-count":0,"title":["Assessing children and youth with global developmental delay and intellectual developmental disorder"],"prefix":"10.1093","volume":"31","author":[{"given":"Scott","family":"McLeod","sequence":"first","affiliation":[{"name":"Canadian Paediatric Society, Mental Health and Developmental Disabilities Committee , Ottawa, Ontario ,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne","family":"Kawamura","sequence":"additional","affiliation":[{"name":"Canadian Paediatric Society, Mental Health and Developmental Disabilities Committee , Ottawa, Ontario ,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Angela","family":"Orsino","sequence":"additional","affiliation":[{"name":"Canadian Paediatric Society, Mental Health and Developmental Disabilities Committee , Ottawa, Ontario ,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,6,8]]},"reference":[{"key":"2026092403365615900_pxag032-B1","doi-asserted-by":"crossref","DOI":"10.1176\/appi.books.9780890425787","volume-title":"Diagnostic and Statistical Manual of Mental Disorders\u2013TR","author":"American Psychiatric Association","year":"2022","edition":"5th edn"},{"issue":"11","key":"2026092403365615900_pxag032-B2","doi-asserted-by":"publisher","first-page":"1071","DOI":"10.1136\/archdischild-2016-311271","article-title":"Current evidence-based recommendations on investigating children with global developmental delay","volume":"102","author":"Mithyantha","year":"2017","journal-title":"Arch Dis Child"},{"issue":"2","key":"2026092403365615900_pxag032-B3","doi-asserted-by":"publisher","first-page":"104","DOI":"10.1007\/s40474-016-0085-7","article-title":"Systematic review of the prevalence and incidence of intellectual disabilities: Current trends and issues","volume":"3","author":"McKenzie","year":"2016","journal-title":"Curr Dev Disord Rep"},{"issue":"7","key":"2026092403365615900_pxag032-B4","doi-asserted-by":"publisher","first-page":"e208603","DOI":"10.1001\/jamanetworkopen.2020.8603","article-title":"Association of family income and risk of food insecurity with iron status in young children","volume":"3","author":"Bayoumi","year":"2020","journal-title":"JAMA Netw Open"},{"key":"2026092403365615900_pxag032-B5","doi-asserted-by":"publisher","first-page":"1122009","DOI":"10.3389\/fpubh.2023.1122009","article-title":"Global prevalence of developmental disabilities in children and adolescents: A systematic umbrella review","volume":"11","author":"Olusanya","year":"2023","journal-title":"Front Public Health"},{"issue":"2","key":"2026092403365615900_pxag032-B6","doi-asserted-by":"publisher","first-page":"e2022056594","DOI":"10.1542\/peds.2022-056594","article-title":"Prevalence and disparities in the detection of autism without intellectual disability","volume":"151","author":"Shenouda","year":"2023","journal-title":"Pediatrics"},{"issue":"2","key":"2026092403365615900_pxag032-B7","doi-asserted-by":"publisher","first-page":"211","DOI":"10.1111\/jar.12233","article-title":"Early intervention for children with intellectual disabilities: An update","volume":"30","author":"Guralnick","year":"2017","journal-title":"J Applied Res Intellect Disabil"},{"issue":"8","key":"2026092403365615900_pxag032-B8","doi-asserted-by":"publisher","first-page":"579","DOI":"10.1503\/cmaj.151437","article-title":"Recommendations on screening for developmental delay","volume":"188","author":"Canadian Task Force on Preventive Health Care","year":"2016","journal-title":"CMAJ"},{"issue":"5","key":"2026092403365615900_pxag032-B9","doi-asserted-by":"publisher","first-page":"283","DOI":"10.1093\/pch\/pxaa135","article-title":"The 2020 Rourke Baby Record release: A time for reflection and looking forward","volume":"26","author":"Rowan-Legg","year":"2021","journal-title":"Paediatr Child Health"},{"issue":"8","key":"2026092403365615900_pxag032-B10","doi-asserted-by":"publisher","first-page":"600","DOI":"10.1111\/j.1469-8749.2008.03197.x","article-title":"Global developmental delay and its relationship to cognitive skills","volume":"51","author":"Riou","year":"2009","journal-title":"Dev Med Child Neurol"},{"issue":"8","key":"2026092403365615900_pxag032-B11","doi-asserted-by":"publisher","first-page":"962","DOI":"10.1111\/jpc.16428","article-title":"Does pre-school developmental assessment agree with later intellectual assessment? 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