A Register Study Suggesting Homotypic and Heterotypic Comorbidity Among Individuals With Learning Disabilities
Aro, T., Neittaanmäki, R., Korhonen, E., Riihimäki, H., & Torppa, M. (2023). A Register Study Suggesting Homotypic and Heterotypic Comorbidity Among Individuals With Learning Disabilities. Journal of Learning Disabilities, OnlineFirst. https://doi.org/10.1177/00222194221150230
Published inJournal of Learning Disabilities
© Hammill Institute on Disabilities 2023
The present study examined whether learning disabilities (LD) in reading and/or math (i.e., reading disability [RD], math disability [MD], and RD+MD) co-occur with other diagnoses. The data comprised a clinical sample (n= 430) with LD identified in childhood and a sample of matched controls (n= 2,140). Their medical diagnoses (according to the International Classification of Diseases nosology) until adulthood (20–39 years) were analyzed. The co-occurrence of LD with neurodevelopmental disorders was considered a homotypic comorbidity, and co-occurrence with disorders or diseases from the other diagnostic categories (i.e., mental and behavioral disorders, diseases of the nervous system, injuries, other medical or physical diagnoses) was considered a heterotypic comorbidity. Both homotypic and heterotypic comorbidity were more common in the LD group. Co-occurring neurodevelopmental disorders were the most prominent comorbid disorders, but mental and behavioral disorders, diseases of the nervous system, and injuries were also pronounced in the LD group. Accumulation of diagnoses across the diagnostic categories was more common in the LD group. No differences were found among the RD, MD, and RD+MD subgroups. The findings are relevant from the theoretical perspective, as well as for clinical and educational practice, as they provide understanding regarding individual distress and guiding for the planning of support. ...
ISSN Search the Publication Forum0022-2194
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Related funder(s)European Commission; Academy of Finland
Funding program(s)Centre of Excellence, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingThe author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The study was supported by partial funding from the Social Insurance Institution of Finland. Torppa is funded by the EarlyMath project, which received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No. 101002966). The CoE InterLearn is funded by the Academy of Finland’s Center of Excellence Program (2022-2029) (grant agreement Nos. 346120 and 346119). ...
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