volume 55 publication number e34

Adult psychiatric outcomes of young people who attended child and adolescent mental health services: a longitudinal total population study

Colm Healy 1, 2
Ulla Lång 1, 3
Kirstie Ohare 1
Johanna Metsälä 1, 4
Karen O'Connor 5, 6
Elaine Lockhart 7, 8
Nicola Byrne 9
Juha Veijola 3
Eero Kajantie 4, 10, 11
Hugh Ramsay 1
Ian Kelleher 1, 2, 3, 12
Publication typeJournal Article
Publication date2025-02-10
scimago Q1
wos Q1
SJR2.424
CiteScore13.2
Impact factor5.5
ISSN00332917, 14698978
Abstract
Background

There is an unprecedented societal focus on young people’s mental health, including efforts to expand access to child and adolescent mental health services (CAMHS). There has, however, been a lack of research to date to investigate adult mental health outcomes of young people who attend CAMHS.

Methods

We linked Finland’s healthcare registries for all individuals born between 1987 and 1992. We investigated mental disorder diagnoses recorded in specialist adult mental health services (AMHS) and both inpatient and outpatient service use by age 29 (December 31, 2016) for former CAMHS patients.

Results

Before the end of their 20s, more than half (52.4%, n = 21,183) of all CAMHS patients had gone on to attend AMHS. The most prevalent recorded adult psychiatric diagnoses received by former CAMHS patients were depressive disorders (30%, n = 11,768), non-phobic anxiety disorders (21%, n = 7,910), alcohol use disorders (9.5%, n = 3,427), personality disorders (9.3%, n = 3,366), and schizophrenia-spectrum disorders (7.6%, n = 2,945). In the total population, more than half of all AMHS appointments (53.1%, k = 714,239/1,345,060) were for former CAMHS patients. More than half of all inpatient psychiatry bed days were for former CAMHS patients (53.1%, k = 1,192,991/2,245,247).

Conclusion

While there is a strong focus on intervening in childhood and adolescence to reduce the burden of mental illness, these findings suggest that young people who receive childhood intervention very frequently continue to require specialist psychiatric interventions in adulthood, including taking up a majority of both outpatient and inpatient service use. These findings highlight the need for a greater focus on research to alter the long-term trajectories of CAMHS patients.

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GOST Copy
Healy C. et al. Adult psychiatric outcomes of young people who attended child and adolescent mental health services: a longitudinal total population study // Psychological Medicine. 2025. Vol. 55. e34
GOST all authors (up to 50) Copy
Healy C., Lång U., Ohare K., Metsälä J., O'Connor K., Lockhart E., Byrne N., Veijola J., Kajantie E., Ramsay H., Kelleher I. Adult psychiatric outcomes of young people who attended child and adolescent mental health services: a longitudinal total population study // Psychological Medicine. 2025. Vol. 55. e34
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RIS Copy
TY - JOUR
DO - 10.1017/s0033291724003568
UR - https://www.cambridge.org/core/product/identifier/S0033291724003568/type/journal_article
TI - Adult psychiatric outcomes of young people who attended child and adolescent mental health services: a longitudinal total population study
T2 - Psychological Medicine
AU - Healy, Colm
AU - Lång, Ulla
AU - Ohare, Kirstie
AU - Metsälä, Johanna
AU - O'Connor, Karen
AU - Lockhart, Elaine
AU - Byrne, Nicola
AU - Veijola, Juha
AU - Kajantie, Eero
AU - Ramsay, Hugh
AU - Kelleher, Ian
PY - 2025
DA - 2025/02/10
PB - Cambridge University Press
VL - 55
SN - 0033-2917
SN - 1469-8978
ER -
BibTex
Cite this
BibTex (up to 50 authors) Copy
@article{2025_Healy,
author = {Colm Healy and Ulla Lång and Kirstie Ohare and Johanna Metsälä and Karen O'Connor and Elaine Lockhart and Nicola Byrne and Juha Veijola and Eero Kajantie and Hugh Ramsay and Ian Kelleher},
title = {Adult psychiatric outcomes of young people who attended child and adolescent mental health services: a longitudinal total population study},
journal = {Psychological Medicine},
year = {2025},
volume = {55},
publisher = {Cambridge University Press},
month = {feb},
url = {https://www.cambridge.org/core/product/identifier/S0033291724003568/type/journal_article},
pages = {e34},
doi = {10.1017/s0033291724003568}
}