Adaptation and validation of the Genetic Counseling Outcome Scale for autism spectrum disorders and related conditions.

TitleAdaptation and validation of the Genetic Counseling Outcome Scale for autism spectrum disorders and related conditions.
Publication TypeJournal Article
Year of Publication2020
AuthorsYusuf A, Peltekova I, Savion-Lemieux T, Frei J, Joober R, Howe J, Scherer SW, Elsabbagh M
JournalJ Genet Couns
Date Published2020 Sep 06
ISSN1573-3599
Abstract

The genetics care pathway experienced by families affected by autism spectrum disorder (ASD) around the time of diagnosis is currently uncharacterized and potentially variable across contexts. The lack of consensus on outcome measures to capture the impact of genetic services for these families shows a gap in understanding and optimizing this genetics care pathway. The Genetic Counseling Outcome Scale (GCOS-24) is a validated outcome measure of clinical genetics services. The current study aims to adapt and validate the GCOS-24 as an outcome measure in the context routine genetic testing in ASD and related conditions. Families seen for their child's developmental evaluation for ASD and related conditions were invited to participate in a genomics cohort between 2016 and 2018. Families (n = 111) completed the mGCOS-24 (modified GCOS-24), adapted from the original GCOS-24 by clinicians working in the target population's routine care pathway. The mGCOS-24 has acceptable internal consistency (Cronbach's α = 0.84) and high test-retest reliability (ICC = 0.88). It also inversely correlates with stress as measured by Perceived Stress Scale (PSS-10) and distress, as measured by the Distress Thermometer, rs ≥ 0.39, ps < 0.001. The mGCOS-24 had adequate readability, as supported by cognitive interviews completed by a sub-sample of five mothers of a child with ASD. Together, our findings show that the mGCOS-24 has good validity for the target population. Preliminary characterization of the genetics care pathway in this population revealed remarkable variability in pre-test counseling and limited post-test counseling. The use of the mGCOS-24 as an outcome measure is useful in filling some of these gaps by offering a way to assess, and in the future, optimize the genetics care pathway for families affected by autism and related neurodevelopmental conditions.

DOI10.1002/jgc4.1323
Alternate JournalJ Genet Couns
PubMed ID32893416
Grant List / / Fonds de Recherche du Québec Santé /
/ / Genome Canada /
/ / Ontario Genomics Institute /
/ / Canadian Institutes of Health Research (CIHR) /
/ / University of Toronto McLaughlin Centre /
/ / Autism Speaks MSSNG Open Science Genome Sequencing Project /
/ / GlaxoSmithKline/CIHR Endowed Chair in Genome Science at the Hospital for Sick Children /
/ / University of Toronto /