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Mental health trajectories of adolescents treated with psychotropic medications: insights from the european milestone study

Mental health trajectories of adolescents treated with psychotropic medications: insights from the european milestone study
Mental health trajectories of adolescents treated with psychotropic medications: insights from the european milestone study
Background.: the transition from Child and Adolescent (CAMHS) to Adult Mental Health Services (AMHS) can be challenging. Drawing on the sample of the European MILESTONE project, we explored changes in clinical profiles and treatment outcomes in adolescents transitioning to AMHS over two years, focusing on different pharmacological treatment patterns.

Methods.: the sample (N = 690; mean age: 17.7 years; SD = 0.29) was categorised into three groups based on medication patterns: continuous (Group 1), intermittent (Group 2), and never medicated (Group 3). Participants underwent four evaluations over two years using tools measuring psychopathology and functioning, including the Health of the Nation Outcome Scale for Child and Adolescents (HoNOSCA) and ASEBA Battery. We employed repeated-measures models to analyse clinical rating changes and a two-way mixed ANOVA to assess interaction between time and groups.

Results: Group 3 had significantly lower mean HoNOSCA ratings than Groups 1 and 2 (p < 0.001), indicating better mental health. By the last time point (T4), the factors associated with a reduced risk of severe illness included an improvement in the risk of suicide attempts (p = 0.038), enhanced everyday functional skills (p = 0.008), higher quality of life (p = 0.001), and being male (p = 0.020). The ASEBA Battery showed Group 1 had more internalising symptoms, while Group 2 had more externalising symptoms than Group 3.

Conclusions: during the transition from CAMHS to AMHS, continuous medication was associated with higher symptom severity than intermittent or no pharmacological treatment. This may reflect either a more severe initial symptomatology requiring sustained pharmacotherapy or a medication-related paradox, whereby symptoms persist or intensify owing to treatment resistance or side effects.
Adolescence; Mental Health; Psychotropic Medication; Care transition; Pharmacotherapy
1359-4184
Magno, Marta
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Martella, Donato
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Leone, Silvia
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Allibrio, Giovanni
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Bertani, Angelo
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Caselani, Elisa
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Conti, Patrizia
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Cortese, Samuele
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Dieleman, Gwen
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Franic, Tomislav
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Gerritsen, Suzanne
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Maffezzoni, Deborah
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Margari, Francesco
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Martinelli, Ottaviano
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McNicholas, Fiona
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Micciolo, Rocco
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Nacinovich, Renata
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Purper-Ouakil, Diane
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Pastore, Adriana
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Rinaldi, Francesco
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Paramala, Santosh
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Scocco, Paolo
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Schulze, Ulrike
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Singh, Swaran
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Squarcia, Antonella
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Stagi, Paolo
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Street, Cathy
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Toffol, Elena
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Tuomainen, Helena
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van Bodegom, Larissa S
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Vicari, Stefano
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de Girolamo, Giovanni
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on behalf the MILESTONE Consortium
Magno, Marta
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Martella, Donato
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Leone, Silvia
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Allibrio, Giovanni
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Bertani, Angelo
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Caselani, Elisa
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Conti, Patrizia
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Cortese, Samuele
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Dieleman, Gwen
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Franic, Tomislav
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Gerritsen, Suzanne
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Maffezzoni, Deborah
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Margari, Francesco
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Martinelli, Ottaviano
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McNicholas, Fiona
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Micciolo, Rocco
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Nacinovich, Renata
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Purper-Ouakil, Diane
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Pastore, Adriana
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Rinaldi, Francesco
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Paramala, Santosh
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Scocco, Paolo
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Schulze, Ulrike
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Singh, Swaran
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Squarcia, Antonella
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Stagi, Paolo
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Street, Cathy
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Toffol, Elena
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Tuomainen, Helena
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van Bodegom, Larissa S
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Vicari, Stefano
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de Girolamo, Giovanni
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Magno, Marta, Martella, Donato and Leone, Silvia , on behalf the MILESTONE Consortium (2025) Mental health trajectories of adolescents treated with psychotropic medications: insights from the european milestone study. Molecular Psychiatry. (doi:10.1038/s41380-025-03307-3).

Record type: Article

Abstract

Background.: the transition from Child and Adolescent (CAMHS) to Adult Mental Health Services (AMHS) can be challenging. Drawing on the sample of the European MILESTONE project, we explored changes in clinical profiles and treatment outcomes in adolescents transitioning to AMHS over two years, focusing on different pharmacological treatment patterns.

Methods.: the sample (N = 690; mean age: 17.7 years; SD = 0.29) was categorised into three groups based on medication patterns: continuous (Group 1), intermittent (Group 2), and never medicated (Group 3). Participants underwent four evaluations over two years using tools measuring psychopathology and functioning, including the Health of the Nation Outcome Scale for Child and Adolescents (HoNOSCA) and ASEBA Battery. We employed repeated-measures models to analyse clinical rating changes and a two-way mixed ANOVA to assess interaction between time and groups.

Results: Group 3 had significantly lower mean HoNOSCA ratings than Groups 1 and 2 (p < 0.001), indicating better mental health. By the last time point (T4), the factors associated with a reduced risk of severe illness included an improvement in the risk of suicide attempts (p = 0.038), enhanced everyday functional skills (p = 0.008), higher quality of life (p = 0.001), and being male (p = 0.020). The ASEBA Battery showed Group 1 had more internalising symptoms, while Group 2 had more externalising symptoms than Group 3.

Conclusions: during the transition from CAMHS to AMHS, continuous medication was associated with higher symptom severity than intermittent or no pharmacological treatment. This may reflect either a more severe initial symptomatology requiring sustained pharmacotherapy or a medication-related paradox, whereby symptoms persist or intensify owing to treatment resistance or side effects.

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More information

Accepted/In Press date: 7 October 2025
e-pub ahead of print date: 17 October 2025
Keywords: Adolescence; Mental Health; Psychotropic Medication; Care transition; Pharmacotherapy

Identifiers

Local EPrints ID: 505863
URI: http://eprints.soton.ac.uk/id/eprint/505863
ISSN: 1359-4184
PURE UUID: c0d1fc68-2f87-4fd8-88c5-05ff63295d3d
ORCID for Samuele Cortese: ORCID iD orcid.org/0000-0001-5877-8075

Catalogue record

Date deposited: 21 Oct 2025 17:01
Last modified: 22 Oct 2025 01:47

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Contributors

Author: Marta Magno
Author: Donato Martella
Author: Silvia Leone
Author: Giovanni Allibrio
Author: Angelo Bertani
Author: Elisa Caselani
Author: Patrizia Conti
Author: Samuele Cortese ORCID iD
Author: Gwen Dieleman
Author: Tomislav Franic
Author: Suzanne Gerritsen
Author: Deborah Maffezzoni
Author: Francesco Margari
Author: Ottaviano Martinelli
Author: Fiona McNicholas
Author: Rocco Micciolo
Author: Renata Nacinovich
Author: Diane Purper-Ouakil
Author: Adriana Pastore
Author: Francesco Rinaldi
Author: Santosh Paramala
Author: Paolo Scocco
Author: Ulrike Schulze
Author: Swaran Singh
Author: Antonella Squarcia
Author: Paolo Stagi
Author: Cathy Street
Author: Elena Toffol
Author: Helena Tuomainen
Author: Larissa S van Bodegom
Author: Stefano Vicari
Author: Giovanni de Girolamo
Corporate Author: on behalf the MILESTONE Consortium

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