TY - JOUR AU - A. J. Gallant AU - K. O'Connor AU - J. P. Lyne AU - L. Ryan AU - M. Doody AU - G. Sheaf AU - A. Higgins AU - D. Cotter AU - R. Murphy AU - L. Doyle AU - D. McEvoy AU - B. Keogh AU - S. Anand-Vembar AU - M. Cannon AU - G. Donohoe AU - O. Longe AU - C. McDonald AU - S. Burke AU - C. Healy AU - L. Staines AU - D. Mongan AU - D. O'Keeffe AU - C. Wilson AU - Y. Kartalova-O'Doherty AU - C. D. Darker A1 - AB - BACKGROUND: Most mental health difficulties (MHD) emerge during adolescence and early adulthood, placing young people at an increased risk for co-occurring physical and sexual health challenges. Shared models of care (SMOC) to connect specialist mental health care with physical and/or sexual health have been developed to address these health needs among young people with MHD. We aimed to identify and characterise SMOC that integrate physical and/or sexual healthcare for young people with MHD, and to synthesise SMOC implementation determinants using the Consolidated Framework for Implementation Research (CFIR) for policy makers, commissioners and practitioners seeking to strengthen youth-integrated service delivery. METHODS: Five electronic databases and key grey literature sites were searched in October 2024. Studies were eligible for inclusion if they predominantly included young people (aged 10–25) with an MHD. SMOC had to address MHD as a primary concern or have parity with the physical and/or sexual health concern(s) being addressed. Key study details were extracted and were appraised using the mixed methods appraisal tool. Screening was conducted in duplicate, with extraction and appraisals conducted by one team member and verified by a second. Findings were thematically synthesised and mapped to CFIR domains to inform implementation planning in youth health systems. RESULTS: Search results identified 25 relevant SMOC to include in the review. Almost all models (n = 23/25) addressed shared care between mental and physical health, while nine addressed mental and sexual health and seven addressed mental, physical and sexual health needs. Reporting quality varied but most SMOC included referral pathways, assessment, treatment and external support components. Barriers frequently mapped to the inner and outer setting CFIR domains, with high staff turnover (n = 9) and societal stigma towards mental health (n = 7) common concerns. Enablers frequently mapped to the process and innovation constructs, including offering youth-specific care models (n = 7) and clear communication between services (n = 5). CONCLUSIONS: Despite evidence supporting the need for an integrated care approach, implementation remains limited by setting-specific barriers. Findings highlight the need for service planning and developing tailored, youth-specific models to ensure a holistic approach to care is available to young people experiencing MHD. REGISTRATION: Open Science Framework (osf.io/rj783). SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12913-026-14178-x. AD - Discipline of Public Health and Primary Care, The University of Ireland Trinity College Dublin, Russell Building, Tallaght Cross, Dublin, D24 DH74, Ireland.; Dr. Steevens' Hospital, Steeven's Lane, Dublin 8, Dublin, D08 W2A8, Ireland.; Department of Psychiatry, Royal College of Surgeons in Ireland, 26 York Street Campus, Dublin, D02 P796, Ireland.; School of Psychology, University of Galway, University Road, Galway, H91 TK33, Ireland.; Mental Health Ireland, -11- 13 Clarence St, Dún Laoghaire, Dublin, A96 E289, Ireland.; School of Nursing and Midwifery, The University of Ireland Trinity College Dublin, The Gas Building, 24 D'Olier Street, Dublin, D02 T283, Ireland.; School of Nursing, Psychotherapy and Community Health, Dublin City University, Glasnevin Campus, Dublin, D09 V209, Ireland.; School of Medicine, University of Galway, University Road, Galway, H91 TK33, Ireland.; School of Medicine, University College Dublin, Health Sciences Centre, Belfield, Dublin 4, Dublin, IE, Ireland.; Centre for Public Health, Queen's University Belfast, Belfast, BT12 6BA, Northern Ireland, UK.; Discipline of Public Health and Primary Care, The University of Ireland Trinity College Dublin, Russell Building, Tallaght Cross, Dublin, D24 DH74, Ireland. catherine.darker@tcd.ie. AN - 41721369 BT - BMC Health Serv Res C5 - Healthcare Disparities; Education & Workforce CP - 1 DA - Feb 20 DO - 10.1186/s12913-026-14178-x DP - NLM ET - 20260220 IS - 1 JF - BMC Health Serv Res LA - eng N2 - BACKGROUND: Most mental health difficulties (MHD) emerge during adolescence and early adulthood, placing young people at an increased risk for co-occurring physical and sexual health challenges. Shared models of care (SMOC) to connect specialist mental health care with physical and/or sexual health have been developed to address these health needs among young people with MHD. We aimed to identify and characterise SMOC that integrate physical and/or sexual healthcare for young people with MHD, and to synthesise SMOC implementation determinants using the Consolidated Framework for Implementation Research (CFIR) for policy makers, commissioners and practitioners seeking to strengthen youth-integrated service delivery. METHODS: Five electronic databases and key grey literature sites were searched in October 2024. Studies were eligible for inclusion if they predominantly included young people (aged 10–25) with an MHD. SMOC had to address MHD as a primary concern or have parity with the physical and/or sexual health concern(s) being addressed. Key study details were extracted and were appraised using the mixed methods appraisal tool. Screening was conducted in duplicate, with extraction and appraisals conducted by one team member and verified by a second. Findings were thematically synthesised and mapped to CFIR domains to inform implementation planning in youth health systems. RESULTS: Search results identified 25 relevant SMOC to include in the review. Almost all models (n = 23/25) addressed shared care between mental and physical health, while nine addressed mental and sexual health and seven addressed mental, physical and sexual health needs. Reporting quality varied but most SMOC included referral pathways, assessment, treatment and external support components. Barriers frequently mapped to the inner and outer setting CFIR domains, with high staff turnover (n = 9) and societal stigma towards mental health (n = 7) common concerns. Enablers frequently mapped to the process and innovation constructs, including offering youth-specific care models (n = 7) and clear communication between services (n = 5). CONCLUSIONS: Despite evidence supporting the need for an integrated care approach, implementation remains limited by setting-specific barriers. Findings highlight the need for service planning and developing tailored, youth-specific models to ensure a holistic approach to care is available to young people experiencing MHD. REGISTRATION: Open Science Framework (osf.io/rj783). SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12913-026-14178-x. PY - 2026 SN - 1472-6963 ST - Implementing shared care models for young people with mental health difficulties: a consolidated framework for implementation research- informed scoping review of service integration across physical, sexual and mental health domains T1 - Implementing shared care models for young people with mental health difficulties: a consolidated framework for implementation research- informed scoping review of service integration across physical, sexual and mental health domains T2 - BMC Health Serv Res TI - Implementing shared care models for young people with mental health difficulties: a consolidated framework for implementation research- informed scoping review of service integration across physical, sexual and mental health domains U1 - Healthcare Disparities; Education & Workforce U3 - 10.1186/s12913-026-14178-x VL - 26 VO - 1472-6963 Y1 - 2026 ER -