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Latent class analysis has proven useful in identifying at\u2010risk groups, thereby informing the design of targeted prevention and early\u2010intervention efforts. Extending prior research to highly complex, high\u2010risk children and families receiving intensive home\u2010based treatment (IHBT), this study analyzed archival data from 10,301 Connecticut families enrolled in the Intensive In\u2010Home Child &amp; Adolescent Psychiatric Service (IICAPS) from May 2014 to February 2020. The objective was to identify clusters of child traumatic events alongside familial and community\u2010level adversities that predict treatment engagement within this marginalized and hard\u2010to\u2010reach population. Using latent class analysis (LCA), four classes emerged: (1) Unspecified Adversity (69% probability of membership across the sample); (2) High Family Adversity (13%); (3) High Child Trauma &amp; Family Adversity (11%); and (4) High Child Trauma (7%). Relative to the Unspecified Adversity group (reference class), all other groups exhibited lower odds of completing treatment. These findings hold implications for developing targeted assessment and intervention strategies to enhance treatment engagement and outcomes for underserved youth in intensive home\u2010based programs.<\/jats:p>","DOI":"10.1002\/jclp.70088","type":"journal-article","created":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T14:31:29Z","timestamp":1768573889000},"page":"563-572","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Child Trauma and Family Adversity Predict Treatment Completion Among High\u2010Risk Youth in Intensive Home\u2010Based Treatment: A Latent Class Analysis of the Intensive In\u2010Home Child &amp; Adolescent Psychiatric Service (IICAPS)"],"prefix":"10.1002","volume":"82","author":[{"given":"Margaret L.","family":"Holland","sequence":"first","affiliation":[{"name":"Child Study Center Yale School of Medicine New Haven Connecticut USA"},{"name":"Department of Population Health and Leadership University of New Haven New Haven Connecticut USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4678-7606","authenticated-orcid":false,"given":"Line B.","family":"Decker","sequence":"additional","affiliation":[{"name":"Child Study Center Yale School of Medicine New Haven Connecticut USA"},{"name":"Division of Mental Health Services, Advisory Unit for Personality Psychiatry Oslo University Hospital Oslo Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rebecca C.","family":"Kamody","sequence":"additional","affiliation":[{"name":"Child Study Center Yale School of Medicine New Haven Connecticut USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Victoria","family":"Stob","sequence":"additional","affiliation":[{"name":"Child Study Center Yale School of Medicine New Haven Connecticut USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joseph L.","family":"Woolston","sequence":"additional","affiliation":[{"name":"Child Study Center Yale School of Medicine New Haven Connecticut USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2026,1,16]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1080\/13575279.2021.1902279"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chiabu.2017.11.010"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10488-021-01116-8"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chiabu.2019.02.005"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40653-024-00643-4"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamapsychiatry.2018.3155"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.3389\/fpsyt.2023.1206511"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamapsychiatry.2024.0039"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.childyouth.2020.105913"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10591-023-09687-4"},{"key":"e_1_2_11_12_1","unstructured":"Decker L. 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