TY - INPR UR - https://doi.org/10.1177/10775595211070765 ID - discovery10144600 EP - 11 N2 - Although we know there are high rates of mental health difficulties amongst young people in out-of-home care (i.e. social welfare-involved children), there is limited evidence on the longitudinal development of these problems, particularly from when they enter the care system. Using the routinely collected carer-reported strengths and difficulties questionnaire, we explored internalising (emotional and peer) and externalising (conduct and hyperactivity) difficulties for 672 young people across their first 3 years in the UK care system (2?16 yrs, 51% boys, 76% Caucasian). In all cases stable profiles (resilient or chronic) were most common, while changing profiles (recovery or delayed) were less common. Findings showed that entry into the care system is not enough of an intervention to expect natural recovery from mental health difficulties. Number of placements and being separated from siblings were associated with greater difficulties. Implications for child welfare and mental health systems are discussed. AV - public Y1 - 2022/01/27/ TI - The Development of Young Peoples' Internalising and Externalising Difficulties Over the First Three-Years in the Public Care System JF - Child Maltreatment PB - SAGE PUBLICATIONS INC A1 - Hiller, Rachel M A1 - Fraser, Abigail A1 - Denne, Megan A1 - Bauer, Andreas A1 - Halligan, Sarah L KW - internalising KW - externalising KW - longitudinal KW - child maltreatment KW - child welfare KW - foster care KW - out-of-home care N1 - This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage). ER -