Genetic and psychosocial influence on the association between early childhood infections and later psychiatric disorders.
Acta Psychiatr Scand
; 146(5): 406-419, 2022 11.
Article
em En
| MEDLINE
| ID: mdl-35999619
ABSTRACT
OBJECTIVE:
To evaluate the influence of extensive genetic and psychosocial confounding on the association between early childhood infection and five major psychiatric disordersMETHODS:
A case-cohort study including participants from the Danish iPSYCH2012 sample, a case-cohort sample where all cases born between May 1, 1981, and December 31, 2005, diagnosed with attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), bipolar affective disorder (BIP), Major Depressive Disorder (MDD) or schizophrenia (SCZ), were identified and pooled with a representative sample (subcohort) of the Danish population. We used Cox proportional hazards regression customized to the case-cohort setup to calculate hazard ratios of outcome with 95% confidence intervals (CIs), following exposure to early childhood infection before the age of 5 years for ADHD and ASD, and before the age of 10 years for BIP, MDD, and SCZ. To evaluate psychosocial confounding we included sex, calendar period, sibling infections, urbanicity, parental socio-economic status, parental mental health information, and polygenic risk scores for all five disorders, as covariates. To estimate how liability for psychiatric disorders measured through the PRS influenced the risk of early childhood infection, we calculated odds ratios (ORs) with 95% CIs, using logistic regressionRESULTS:
Early childhood infection was associated with ADHD, ASD, MDD, and SCZ with number of childhood infections increasing the hazard. The HR was still significant in the model with full adjustments after 1 infection for ADHD (HR 1.29, 95% CI 1.19-1.41), ASD (HR 1.28, 95% CI 1.18-1.40), MDD (HR 1.23, 95% CI 1.14-1.33), and SCZ (HR 1.21, 95% CI 1.07-1.36), but not for BIP (HR1.17, 95% CI 0.96-1.42). Probands exposed to sibling infections, but not own infection had an absolute risk of ADHD, BIP, MDD, and SCZ that closely approached the absolute risk for individuals exposed to own infections. We found evidence of gene-environment correlation with higher PRS of MDD and to some extent SCZ increasing the risk of infections and higher PRS of BIP associated with significantly decreased riskCONCLUSION:
Early childhood infection is significantly associated with ADHD, ASD, MDD, and SCZ and not explained by genetic or psychosocial confounding. Although we found evidence of gene-environment correlation, it had minor impact on the results.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Transtorno do Deficit de Atenção com Hiperatividade
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Transtorno Bipolar
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Transtorno Depressivo Maior
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Transtorno do Espectro Autista
Tipo de estudo:
Diagnostic_studies
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Etiology_studies
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Incidence_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Child
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Child, preschool
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Humans
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article