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Data were drawn from the Longitudinal Studies of Child Abuse and Neglect (LONGSCAN;\n                    <jats:italic>N<\/jats:italic>\n                    = 1,354), a prospective cohort of children at risk for maltreatment. Children in the study were recruited by the time they were 4 years old (\n                    <jats:italic>M<\/jats:italic>\n                    <jats:sub>age<\/jats:sub>\n                    = 4.56 years,\n                    <jats:italic>SD<\/jats:italic>\n                    = 0.70), and the sample was 50.8% female and 51.8% Black (25.7% White, 8.0% Hispanic, 1.0% Native American, 0.5% Asian, 11.3% mixed race, 1.7% other). Confirmed indicators characterized maltreatment prior to and after age 4 years. Adolescent self\u2010report indicators identified maltreatment prior to 16 years of age and corrected contamination. Psychopathology was assessed via self\u2010report at the LONGSCAN Age 16 assessment. Propensity score analyses indicated that maltreatment prior to 4 years of age only predicted significantly greater adolescent psychopathology symptoms after correcting contamination,\n                    <jats:italic>B =<\/jats:italic>\n                    6.40, 95% CI [2.02, 10.79],\n                    <jats:italic>SMD<\/jats:italic>\n                    = 0.32,\n                    <jats:italic>p<\/jats:italic>\n                    =\u00a0.004. Further, effect magnitudes increased 67% by correcting contamination. The results were robust to adjustments for maltreatment reexposure and covariate quality informing propensity score analyses. Correcting contamination can aid the discovery and replication of the effects of early life maltreatment on psychopathology.\n                  <\/jats:p>","DOI":"10.1002\/jts.70076","type":"journal-article","created":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T05:34:33Z","timestamp":1778304873000},"page":"801-812","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Variation in early\u2010life maltreatment effects on adolescent psychopathology due to contamination"],"prefix":"10.1002","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2512-8548","authenticated-orcid":false,"given":"Emily D.","family":"Dunning","sequence":"first","affiliation":[{"name":"Department of Human Development and Family Studies The Pennsylvania State University  University Park Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6700-5656","authenticated-orcid":false,"given":"Chad E.","family":"Shenk","sequence":"additional","affiliation":[{"name":"Department of Psychology University of Rochester  Rochester New York USA"},{"name":"Mt. 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