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dc.contributor.authorSheikhi, A.
dc.contributor.authorMartin, Neilson
dc.contributor.authorHay, David
dc.contributor.authorPiek, Jan
dc.date.accessioned2017-01-30T13:13:03Z
dc.date.available2017-01-30T13:13:03Z
dc.date.created2012-12-23T20:00:12Z
dc.date.issued2012
dc.identifier.citationSheikhi, Abdullah R. and Martin, Neilson and Hay, David and Piek, Jan P. 2012. Phenotype refinement for comorbid Attention Deficit Hyperactivity Disorder and reading disability. American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 162 (1): pp. 44-54.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/29454
dc.identifier.doi10.1002/ajmg.b.32119
dc.description.abstract

Comorbidity between Attention Deficit Hyperactivity Disorder (ADHD) and reading disability (RD) is common; however, the heritability of this comorbidity is not well understood. This may be due to the complexity and heterogeneity of ADHD and RD phenotypes. Using alternative ADHD–RD sub-phenotypes instead of those arising from the DSM-IV may lead to greater success in the search for comorbid ADHD–RD susceptibility genes. Therefore, this study aims to refine ADHD–RD phenotypes into homogenous informative sub-phenotypes using latent class analysis (LCA). LCA was performed on 2,610 Australian twin families (6,535 individuals) in order to generate probabilistic genetically distinct classes that define ADHD–RD subtypes, including comorbidity, based on related symptom clusters. The LCA separated the phenotypes for ADHD and RD into nine classes. One class was unaffected; three classes demonstrated the three DSM-IV subtypes of ADHD, three subtypes showed different severities of RD, and two classes expressed a combination of RD and ADHD subtypes. LCA proved effective in refining the phenotypes of ADHD alone, RD alone, and ADHD–RD comorbidity, and its ability to classify them into homogenous groups based on clusters of symptoms, suggesting that the latent classes may be robust enough to use in molecular genetic studies.

dc.publisherJohn Wiley and Sons, Inc
dc.subjectlatent class analysis
dc.subjectgenetics
dc.subjectphenomics
dc.subjectheterogeneity
dc.subjecttwins
dc.titlePhenotype refinement for comorbid Attention Deficit Hyperactivity Disorder and reading disability
dc.typeJournal Article
dcterms.source.volume162
dcterms.source.startPage44
dcterms.source.endPage54
dcterms.source.issn01487299
dcterms.source.titleAmerican Journal of Medical Genetics
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curtin.accessStatusFulltext not available


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