Abstract
Purpose
The aim of this literature review is to examine evidence of time trends and birth cohort effects in depressive disorders and symptoms among US adolescents in peer-reviewed articles from January 2004 to April 2022.
Methods
We conducted an integrative systematic literature review. Three reviewers participated at different stages of article review. Of the 2234 articles identified in three databases (Pubmed, ProQuest Central, Ebscohost), 10 met inclusion criteria (i.e., adolescent aged United States populations, included information about birth cohort and survey year, focused on depressive symptoms/disorders).
Results
All 10 articles observed increases in depressive symptoms and disorders in adolescents across recent survey years with increases observed between 1991 and 2020. Of the 3 articles that assessed birth cohort trends, birth cohort trends were less prominent than time period trends. Proposed explanations for increases included social media, economic-related reasons, changes in mental health screening and diagnosis, declining mental health stigma, increased treatment, and, in more recent years, the COVID-19 pandemic.
Conclusions
Multiple cross-sectional surveys and cohort studies documented rising prevalence of depressive symptoms and disorder among adolescents from 1991 to 2020. Mechanisms driving this increase are still unknown. Research to identify these mechanisms is needed to inform depression screening and intervention efforts for adolescents.
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Funding
DWB is a fellow of the Canadian Institute for Advanced Research (CIFAR) Child Brain Development (CBD) Network.
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Dr. Melanie Askari conceptualized and designed the study, conducted the literature review, drafted the article, and revised the manuscript text. Drs. Daniel Belsky, Mark Olfson, Joshua Breslau, and Ramin Mojtabai helped with interpretation of findings and reviewed/revised the article critically for important intellectual content. Drs. Sandhya Kajeepeta and Emilie Bruzelius helped conduct the literature review and reviewed/revised the article critically for important intellectual content. Dr. Katherine Keyes provided guidance for the conceptualization and design of the study, helped with interpretation of findings, and reviewed/revised the article critically for important intellectual content.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Appendix Table: Literature review search details
Appendix Table: Literature review search details
Pubmed; searched April 6, 2022 | ProQuest central (Psychology database, Public health database, social science database); searched April 6, 2022 | Ebscohost (APA PSYCINFO database, SocINDEX with Full Text database, social sciences full text database); searched April 6, 2022 |
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[(birth year) OR (birth cohort) OR (cohort effects)] AND [(time trends)] OR (time period) AND [(major depressive episode) OR (depression) OR (major depressive disorder) OR (minor depression) OR (depression) OR (depressive symptoms)] AND [(adolescent) OR (youth) OR (high school students) OR (middle school) OR (adolescence) OR (teen) OR (teenager) OR (teenagers)] AND [(epidemiologic studies) OR (cohort studies) OR (case–control studies) OR (longitudinal studies) OR (cross-sectional studies) OR (observational studies) OR (ecological studies)] AND (United States) -Additional filters: published between 2004 and present | [(birth year) OR (birth cohort) OR (cohort effects)] AND [(time trends) OR (time period)] AND [(major depressive episode) OR (depression) OR (major depressive disorder) OR (minor depression) OR (depression) OR (depressive symptoms)] AND [(adolescent) OR (youth) OR (high school students) OR (middle school) OR (adolescence) OR (teen) OR (teenager) OR (teenagers)] AND [(epidemiologic studies) OR (cohort studies) OR (case–control studies) OR (longitudinal studies) OR (cross-sectional studies) OR (observational studies) OR (ecological studies)] AND (United States) AND loc(United States) -Additional filters: source type = scholarly journals, language = English, exclude duplicate documents (removed duplicates across these 3 databases within proquest central), did NOT select spelling variants for your search terms or form variants for your search terms -extra filters: published after dec 31, 2003, subject: mental health OR mental depression, document type: article, language: English, peer reviewed, full text | [(birth year) OR (birth cohort) OR (cohort effects)] AND [(time trends) OR (time period)] AND [(major depressive episode) OR (depression) OR (major depressive disorder) OR (minor depression) OR (depression) OR (depressive symptoms)] AND [(adolescent) OR (youth) OR (high school students) OR (middle school) OR (adolescence) OR (teen) OR (teenager) OR (teenagers)] AND [(epidemiologic studies) OR (cohort studies) OR (case–control studies) OR (longitudinal studies) OR (cross-sectional studies) OR (observational studies) OR (ecological studies)] AND United States -Additional filters: peer reviewed and published between 2004 and present |
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Askari, M.S., Belsky, D.W., Olfson, M. et al. An integrative literature review of birth cohort and time period trends in adolescent depression in the United States. Soc Psychiatry Psychiatr Epidemiol (2023). https://doi.org/10.1007/s00127-023-02527-8
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DOI: https://doi.org/10.1007/s00127-023-02527-8