Abstract
Studies of 16p11.2 copy number variants (CNVs) provide an avenue to identify mechanisms of impairment and develop targeted treatments for individuals with neurodevelopmental disorders. 16p11.2 deletion and duplication phenotypes are currently being ascertained; however, sleep disturbances are minimally described. In this study, we examine sleep disturbance in a well-characterized national sample of 16p11.2 CNVs, the Simons Foundation Autism Research Initiative (SFARI) database of youth and adults (n = 692). Factor analyses and multilevel models of derived sleep questionnaires for youth (n = 345) and adults (n = 347) indicate that 16p11.2 carriers show elevated sleep disturbance relative to community controls. Non-carrier family members also show elevated sleep disturbance. However, sleep duration does not differ between carriers and controls. Further studies of sleep in 16p11.2 are needed.
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Notes
Fisher-Freeman-Halton exact tests determine whether observed values differ from expected values overall for all groups, but do not allow for firm conclusions about which specific differences are significant.
Notation: PSQij = Pediatric sleep questionnaire score (outcome variable); γ00 = Level 2 intercept/grand mean across level 2 units; u0j = random error term; rij = Level 1 residual error term.
All contrasts here and throughout met the assumption of residual variances not differing across families.
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Preparation of this article was supported in part by Grants UH2DE025980 and UL1TR002733 from the National Institutes of Health. The authors would like to thank Drs. Nicholas J. Rockwood, Andrea N. Witwer, and Michael Vasey for their feedback and contributions. In addition, we would like to thank the Simons Foundation and Simons VIP participating sites and families for making this work possible. The authors declare they have no conflicts of interest. All authors contributed to the conceptualization of the project and manuscript development. Data analysis was completed by the primary author with guidance from Drs. Beauchaine and De Boeck.
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All authors contributed to the conceptualization of the project and manuscript preparation. DK prepared data and completed analyses with guidance from TB and PDB.
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Kamara, D., De Boeck, P., Lecavalier, L. et al. Characterizing Sleep Problems in 16p11.2 Deletion and Duplication. J Autism Dev Disord 53, 1462–1475 (2023). https://doi.org/10.1007/s10803-021-05311-2
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DOI: https://doi.org/10.1007/s10803-021-05311-2