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2024 (English)In: JCPP Advances, E-ISSN 2692-9384, Vol. 4, no 2, article id e12225Article in journal (Refereed) Published
Abstract [en]
Background: Evidence for substance use-related problems in individuals with mild intellectual disability is sparse and mainly limited to selected psychiatric populations. We evaluated the risk of substance use-related problems in individuals with mild intellectual disability compared to the general population. Additionally, we have performed secondary sibling comparison analyses to account for familial confounding.
Methods: We conducted a population-based cohort study of individuals born in Sweden between 1973 and 2003. A total of 18,307 individuals with mild intellectual disability were compared to 915,350 reference individuals from the general population and 18,996 full siblings of individuals with mild intellectual disability. Information on mild intellectual disability and substance use-related problems was obtained from several Swedish national and regional school and healthcare registers. Substance use-related problems were measured via corresponding diagnostic and legal codes and included alcohol use disorder, drug use disorder, alcohol-related somatic disease, conviction for a substance-related crime, and substance-related death.
Results: Individuals with mild intellectual disability had a higher risk of any substance use-related problem compared to the general population (HR, 1.81; 95% CI, 1.72–1.91), both in males (HR, 1.76; 95% CI, 1.65–1.89) and females (HR, 1.89; 95% CI, 1.74–2.05). The risks of substance use-related problems were particularly elevated among individuals with mild intellectual disability and psychiatric comorbidities (HR, 2.21–8.24). The associations were attenuated in the sibling comparison models.
Conclusions: Individuals with mild intellectual disability, especially those with psychiatric comorbidity, are at an elevated risk of substance use-related problems. Familial factors shared by full siblings contribute considerably to the association between mild intellectual disability and substance use-related problems. © 2024 The Authors. JCPP Advances published by John Wiley & Sons Ltd on behalf of Association for Child and Adolescent Mental Health.
Place, publisher, year, edition, pages
Chichester: Wiley-Blackwell, 2024
Keywords
alcohol abuse, criminality, drug abuse, intellectual disability, substance use
National Category
Social Work
Identifiers
urn:nbn:se:hh:diva-54347 (URN)10.1002/jcv2.12225 (DOI)001283278800010 ()38827981 (PubMedID)2-s2.0-85197426539 (Scopus ID)
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2018-01789Stiftelsen Söderström - Königska sjukhemmet, SLS969059Swedish Research Council, 2017-00788NordForsk, 147386Region Stockholm
Note
Funding: The study has been financed by the grants from the Swedish Research Council for Health, Working Life and Welfare (FORTE, No 2018-01789), MISA (grant 20100825) and Stiftelsen Söderström - Königska sjukhemmet (SLS969059). Agnieszka Butwicka was supported by the Swedish Research Council (No 2017-00788), NordForsk (No 147386) and through the regional agreement on clinical research between Stockholm Region and Karolinska Institutet (ALF, No 20180718) while working on this project. Mark Taylor was supported by a Fellows Award from MQ Mental Health Research (MQ20/19).
2024-08-012024-08-012024-08-16Bibliographically approved