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To address this, we use data from 158 participants from the Special Needs and Autism Project cohort studied at three time-points from 12 to 23\u2009years. We used latent growth models to study the role of child, family, and contextual characteristics on the conduct, emotional, and attention deficit hyperactivity disorder domains of the parent-reported Strengths and Difficulties Questionnaire. Symptoms decreased significantly over time for all three domains, but many participants still remained above the published cutoffs for likely disorder on at least one of the three domains. Individual trajectories showed high levels of persistence. Higher initial adaptive function and language levels predicted a greater decline in conduct and attention deficit hyperactivity disorder symptoms. In contrast, increased emotional symptoms were predicted by higher language functioning, lower levels of autism symptom severity and higher parental education. Greater neighborhood deprivation was associated with more conduct problems but also a greater decline over time. Our findings highlight that it may be possible to accurately predict mental health trajectories over this time period, which could help parents and carers in planning and help professionals target resources more efficiently.<\/jats:p>\n                  <jats:sec>\n                    <jats:title>Lay Abstract<\/jats:title>\n                    <jats:p>Although mental health problems are common in autism, relatively little is known about their stability and the factors that influence their persistence or change over the life-course. To address this, we use data from the Special Needs and Autism Project (SNAP) cohort studied at three time-points from 12 to 23\u2009years. Using the parent-reported Strengths and Difficulties Questionnaire (SDQ) domains of conduct, emotional, and ADHD symptoms, we evaluated the role of child, family, and contextual characteristics on these three trajectories. Symptoms decreased significantly over time for all three domains, but many participants still scored above the published disorder cutoffs. Individuals showed high levels of persistence. Higher initial adaptive function and language levels predicted a greater decline in conduct and ADHD symptoms. In contrast, higher language functioning was associated with higher levels of emotional symptoms, as was lower levels of autism symptom severity and higher parental education. Those with higher neighborhood deprivation had higher initial conduct problems but a steeper decline over time. Our findings highlight that it may be possible to accurately predict mental health trajectories over this time period, which could help parents and carers in planning and help professionals target resources more efficiently.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/1362361320908972","type":"journal-article","created":{"date-parts":[[2020,3,19]],"date-time":"2020-03-19T09:19:51Z","timestamp":1584609591000},"page":"1011-1024","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":70,"title":["Trajectories of emotional and behavioral problems from childhood to early adult life"],"prefix":"10.1177","volume":"24","author":[{"given":"Dominic","family":"Stringer","sequence":"first","affiliation":[{"name":"King\u2019s College London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rachel","family":"Kent","sequence":"additional","affiliation":[{"name":"King\u2019s College London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jackie","family":"Briskman","sequence":"additional","affiliation":[{"name":"South London and Maudsley NHS Foundation Trust, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steve","family":"Lukito","sequence":"additional","affiliation":[{"name":"King\u2019s College London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tony","family":"Charman","sequence":"additional","affiliation":[{"name":"King\u2019s College London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gillian","family":"Baird","sequence":"additional","affiliation":[{"name":"Guy\u2019s and St Thomas\u2019 NHS Foundation Trust, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5633-1253","authenticated-orcid":false,"given":"Catherine","family":"Lord","sequence":"additional","affiliation":[{"name":"UCLA Semel Institute for Neuroscience and Human Behavior, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew","family":"Pickles","sequence":"additional","affiliation":[{"name":"King\u2019s College London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5450-0823","authenticated-orcid":false,"given":"Emily","family":"Simonoff","sequence":"additional","affiliation":[{"name":"King\u2019s College London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2020,3,19]]},"reference":[{"key":"bibr1-1362361320908972","first-page":"229","volume-title":"Forensic uses of clinical assessment instruments","author":"Achenbach T. 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