Parental history of psychiatric disorders and risk of type 1 diabetes in offspring

Elsevier

Available online 1 October 2022, 101392

Diabetes & MetabolismAbstractObjective

. To examine risk of type 1 diabetes mellitus (T1DM) in the offspring of parents with a psychiatric history at the birth of the child, which would suggest potential shared familial or environmental risk factors between T1DM and psychiatric disorders.

Methods

. We established a cohort including all children born in Sweden in 1997-2016, and their parents. Children were followed up from birth until 31 Dec 2017, using national registers. Relative risk for T1DM was estimated by incidence rate ratios (RR) with 95% confidence intervals (CI), calculated from Poisson regression. We examined psychiatric subtypes, T1DM risk within subgroups and in relation to the timing of exposure.

Results

. The study cohort included 1,497,949 children. During follow-up, 7,794 cases of T1DM were identified. Children of mothers with psychiatric disorders at delivery had a higher risk of T1DM (RR 1.10 [95%CI 1.01-1.20]). Psychiatric diagnoses in fathers or assigned after delivery was not associated with increased T1DM risk. The observed association disappeared after adjusting for T1DM in parents; however, remained significant in female offspring. Maternal eating disorder (RR 1.53 [1.17-2.00]) and obsessive-compulsive disorder (RR 1.62 [1.02-2.58]) were associated with offspring T1DM, independent of parental T1DM.

Conclusion

. Our results do not support a strong genetic link between psychiatric conditions and T1DM. However, the risks of offspring T1DM were increased in subgroups of female offspring and in offspring of mothers with a history of eating disorder or obsessive-compulsive disorder, independent of heredity for T1DM, which may warrant further investigation in future studies.

Key word

Cohort

Familial risk

Psychiatric disorder

Type 1 diabetes mellitus

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© 2022 Published by Elsevier Masson SAS.

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