Phenotypic variation between parent-offspring trios and non-trios in genetic studies of schizophrenia

Zammit, Stanley ORCID: https://orcid.org/0000-0002-2647-9211, Lewis, G., Thapar, Anita ORCID: https://orcid.org/0000-0002-3689-737X, Owen, R., Jones, G., Jones, S., Sanders, R., Milham, C., Mahdi, A., O'Donovan, Michael Conlon ORCID: https://orcid.org/0000-0001-7073-2379 and Owen, Michael John ORCID: https://orcid.org/0000-0003-4798-0862 2006. Phenotypic variation between parent-offspring trios and non-trios in genetic studies of schizophrenia. Journal of Psychiatric Research 40 (7) , pp. 622-626. 10.1016/j.jpsychires.2005.05.006

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Abstract

BACKGROUND: Phenotypic differences between parent-offspring trios and non-trios have been reported for various psychiatric disorders, and it has been suggested that this may make comparisons of case-control and family-based results for gene-disease association studies inappropriate. AIMS: To compare phenotypes between trios and non-trios with schizophrenia, and explore possible reasons for differences observed. METHOD: Phenotypes were compared between trios (n=75) and non-trios (n=424) collected as part of a case-control study. RESULTS: Differences were observed for most phenotypes investigated, although all were eliminated after adjusting for confounding. CONCLUSIONS: Confounding, genetic heterogeneity or selection bias could result in differences in case-control and family-based results. However as we discuss, where adequately designed case-control studies are used, gene-disease association results would be incomparable between family-based and case-control studies only if genetic heterogeneity was present. These results do not support the presence of such genetic heterogeneity in schizophrenia.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Medicine Research Institutes & Centres > MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG) Research Institutes & Centres > Neuroscience and Mental Health Research Institute (NMHII)
Subjects:	R Medicine > R Medicine (General)
Publisher:	Elsevier
ISSN:	0022-3956
Last Modified:	05 Nov 2025 23:06
URI:	https://orca.cardiff.ac.uk/id/eprint/83428

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