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The aims of this study were to identify population-based trajectories of mental health service use across childhood and adolescence and associated sociodemographic\/other risk factors.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Mental health trajectories between birth and 17 years of age were identified using zero-inflated Poisson latent-class growth mixture modelling, in a New South Wales cohort of 9510 children (born between 2002 and 2005) who had at least one primary diagnosis of a mental disorder recorded in \u2018Emergency Department\u2019, \u2018Admitted Patients\u2019 and\/or \u2018Mental Health Ambulatory\u2019 data collections.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      A two-trajectory solution provided the optimal fit to the data: One trajectory displayed\n                      <jats:italic toggle=\"yes\">high<\/jats:italic>\n                      increasing service use (\n                      <jats:italic toggle=\"yes\">n<\/jats:italic>\n                      = 1861, 19.6%) and accounting for more than 68% of the days treated for mental disorder among the entire cohort. The other trajectory (\n                      <jats:italic toggle=\"yes\">n<\/jats:italic>\n                      = 7649, 80.4%) was distinguished by a consistently\n                      <jats:italic toggle=\"yes\">low<\/jats:italic>\n                      level of service use. Membership in the\n                      <jats:italic toggle=\"yes\">high<\/jats:italic>\n                      mental health service use trajectory was associated with parental mental disorder, child maltreatment exposure and diagnoses of psychosis spectrum and personality disorders.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Less than one-fifth of children account for more than 68% of hospital and ambulatory services used up to age 17 years; these children are more likely to have parents with mental disorder and to have been exposed to child maltreatment, pointing towards multi-disciplinary supports as a basis for early intervention.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/00048674251324805","type":"journal-article","created":{"date-parts":[[2025,3,14]],"date-time":"2025-03-14T09:02:18Z","timestamp":1741942938000},"page":"457-468","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Latent trajectories of mental health service use in an Australian state population cohort of children"],"prefix":"10.1177","volume":"59","author":[{"given":"Oliver J","family":"Watkeys","sequence":"first","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stacy","family":"Tzoumakis","sequence":"additional","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"},{"name":"Griffith Criminology Institute, Griffith University, Southport, QLD, Australia"},{"name":"School of Criminology and Criminal Justice, Griffith University, Southport, QLD, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3510-5892","authenticated-orcid":false,"given":"Kimberlie","family":"Dean","sequence":"additional","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"},{"name":"Justice Health and Forensic Mental Health Network, Matraville, NSW, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3987-6486","authenticated-orcid":false,"given":"Kristin R","family":"Laurens","sequence":"additional","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"},{"name":"School of Psychology and Counselling, Queensland University of Technology (QUT), Brisbane, QLD, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Felicity","family":"Harris","sequence":"additional","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kirstie","family":"O\u2019Hare","sequence":"additional","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"},{"name":"Centre for Clinical Brain Sciences, The University of Edinburgh, Edinburgh, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vaughan J","family":"Carr","sequence":"additional","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"},{"name":"Department of Psychiatry, Monash University, Melbourne, VIC, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9361-4874","authenticated-orcid":false,"given":"Melissa J","family":"Green","sequence":"additional","affiliation":[{"name":"School of Clinical Medicine, Discipline of Psychiatry and Mental Health, Faculty of Medicine and Health, University of New South Wales (UNSW), Sydney, NSW, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,3,14]]},"reference":[{"key":"e_1_3_3_2_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0187141"},{"key":"e_1_3_3_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.yfrne.2014.05.004"},{"key":"e_1_3_3_4_1","unstructured":"Australian Bureau of Statistics (ABS) (2006) 1216.0 \u2013 Australian Standard Geographical Classification (ASGC). 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