Examining the association between autistic traits and atypical sensory reactivity: a twin study

Taylor, M. J., Gustafsson, P., Larsson, H., Gillberg, C. , Lundström, S. and Lichstenstein, P. (2018) Examining the association between autistic traits and atypical sensory reactivity: a twin study. Journal of the American Academy of Child and Adolescent Psychiatry, 57(2), pp. 96-102. (doi: 10.1016/j.jaac.2017.11.019) (PMID:29413155)

Full text not currently available from Enlighten.

Abstract

Objective: Atypical responses to sensory stimuli are common features of autism spectrum disorders (ASD). Consequently, atypical sensory reactivity (SR) is now a diagnostic feature of ASD. Quantitative genetic research on ASD has overlooked these symptoms, however. We therefore investigated the association between autistic traits and SR using twin methods. Method: Autistic traits and SR were assessed by 2 separate scales in 12,419 Swedish twin pairs (n = 3,586 monozygotic [MZ], n = 8,833 dizygotic [DZ]) when the twins were 9 or 12 years of age. The classic twin design estimated the degree to which etiological factors associated with autistic traits were also associated with SR, and the degree to which such shared factors explained the covariance between these phenotypes. DeFries–Fulker analysis estimated the genetic correlation between screening diagnoses of ASD, defined broadly and strictly, and SR. Results: Autistic traits and SR were both highly heritable (62%–75% and 66%–71%, respectively). There was a moderate phenotypic correlation between autistic traits and SR (r = 0.47). Genetic influences on these phenotypes correlated moderately (genetic correlation = 0.60). These overlapping genetic factors explained most of the correlation between autistic traits and SR. Genetic correlations with SR increased for broad ASD (genetic correlation = 0.72) and strict ASD (genetic correlation = 0.80). Conclusion: The genetic overlap observed between autistic traits and SR lends quantitative genetic support to the notion that ASD and SR are strongly linked. Such symptoms may thus comprise part of the ASD genotype, as well as phenotype. Associations persisted across all definitions of ASD, indicating a genetic link between the broader ASD phenotype and SR.

Item Type:Articles
Additional Information:CATSS is funded by the Swedish Council for Work Life and Social Research andthe Swedish Research Council. The authors acknowledge support from theSwedish Research Council through the Swedish Initiative for Research onMicrodata in the Social and Medical Sciences (SIMSAM) framework (grant no.340-2013-5867). C.G. is funded by the Swedish Research Council and Ann-Marie and Per Ahlqvist Foundation.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gillberg, Professor Christopher
Authors: Taylor, M. J., Gustafsson, P., Larsson, H., Gillberg, C., Lundström, S., and Lichstenstein, P.
College/School:College of Medical Veterinary and Life Sciences > Institute of Health and Wellbeing > Mental Health and Wellbeing
Journal Name:Journal of the American Academy of Child and Adolescent Psychiatry
Publisher:Elsevier
ISSN:0890-8567
ISSN (Online):1527-5418
Published Online:05 December 2017

University Staff: Request a correction | Enlighten Editors: Update this record