Abstract
Background
We examined the association between childhood poverty and mental health disorders (MHD) in childhood and early adulthood. We also investigated whether the association between poverty in childhood and MHD is mediated by exposure to stressful life events (SLE).
Methods
We used data from a prospective community cohort of young people assessed at baseline (M = 9.7 years, SD = 1.9), first (M = 13.5 years, SD = 1.9), and second (M = 18.2 years, SD = 2.0) follow-ups (N = 1,590) in Brazil. Poverty was assessed using a standardized classification. Exposure to 20 different SLE was measured using the Life History instrument. Psychiatric diagnoses were evaluated using the Development and Well-Being Assessment. Latent growth models investigated the association between poverty at baseline and the growth of any MHD, externalizing, and internalizing disorders. Mediation models evaluated whether the association between childhood poverty and MHD in early adulthood was mediated by exposure to SLE.
Results
Poverty affected 11.4% of the sample at baseline and was associated with an increased propensity for presenting externalizing disorders in adolescence or early adulthood (standardized estimate = 0.27, p = 0.016). This association was not significant for any disorder or internalizing disorders. Childhood poverty increased the likelihood of externalizing disorders in early adulthood through higher exposure to SLE (OR = 1.07, 95 CI% 1.01–1.14). Results were only replicated among females in stratified analyses.
Conclusions
Childhood poverty had detrimental consequences on externalizing MHD in adolescence, especially among females. Poverty and SLE are preventable risk factors that need to be tackled to reduce the burden of externalizing disorders in young people.
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Availability of data and material
CZ have full access to all the data used in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Data were provided by the Brazilian High-Risk Cohort study and are available upon request in the Open Science Framework public repository (https://osf.io/ktz5h/).
Code availability
Please, contact the corresponding author.
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Funding
The research presented in this article was supported by the National Institute of Developmental Psychiatry for Children and Adolescents, a science and technology institute funded by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq; National Council for Scientific and Technological Development; Grant numbers 573974/2008–0 and 465550/2014–2) and Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP Grant number 2008/57896–8 and 2014/50917–0). CZ receives a Young Talent Research Scholarship by the Coordination for the Improvement of Higher Education Personnel (CAPES, Brazil, Grant number 88887.575201/2020–00).
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CZ and AG participated in the conception and analytic strategies of the current study. CZ and JS did the analysis. CZ drafted the manuscript. PMP, EM, RAB, GS, JM, LAR, JS, and AG, developed and conducted the BHRC. All authors made substantial contributions to the interpretation of the data and revision of the text. All authors approved the final version of the manuscript.
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CZ, SEL, MCRA, MH, LF, MB, PMP, EM, RAB, GS, JS, and JM have no conflict of interest to declare. LAR has received grant or research support from, served as a consultant to, and served on the speakers’ bureau of Aché, Bial, Medice, Novartis/Sandoz, Pfizer/Upjohn, and Shire/Takeda in the last three years. The ADHD and Juvenile Bipolar Disorder Outpatient Programs chaired by Dr LAR have received unrestricted educational and research support from the following pharmaceutical companies in the last three years: Novartis/Sandoz and Shire/Takeda. Dr LAR has received authorship royalties from Oxford Press and ArtMed. AG has been a consultant and/or advisor to or has received honoraria from Aché, Daiichi-Sankyo, Torrent, Cristalia, and Janssen.
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All procedures were approved by the Ethics Committee of the Federal University of São Paulo and Hospital de Clínicas de Porto Alegre.
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Child assent and parental informed consent were obtained from all the research subjects.
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Ziebold, C., Evans-Lacko, S., Andrade, M.C.R. et al. Childhood poverty and mental health disorders in early adulthood: evidence from a Brazilian cohort study. Eur Child Adolesc Psychiatry 32, 903–914 (2023). https://doi.org/10.1007/s00787-021-01923-2
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DOI: https://doi.org/10.1007/s00787-021-01923-2