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Hierarchical linear regressions models were used to test the hypotheses.<\/jats:p><\/jats:sec><jats:sec><jats:title>Data Collection<\/jats:title><jats:p>Client data were collected during personal interviews at admission and discharge for most participants.<\/jats:p><\/jats:sec><jats:sec><jats:title>Principal Findings<\/jats:title><jats:p><jats:styled-content style=\"fixed-case\">A<\/jats:styled-content>frican <jats:styled-content style=\"fixed-case\">A<\/jats:styled-content>mericans and <jats:styled-content style=\"fixed-case\">L<\/jats:styled-content>atinos reported lower odds of completing treatment compared with <jats:styled-content style=\"fixed-case\">W<\/jats:styled-content>hites. Within\u2010group analysis revealed significant heterogeneity within racial and ethnic groups, highlighting primary drug problem, days of drug use before admission, and homelessness as significant factors affecting treatment completion. Service factors, such as referral by the criminal justice system, enabled completion among <jats:styled-content style=\"fixed-case\">L<\/jats:styled-content>atinos and <jats:styled-content style=\"fixed-case\">W<\/jats:styled-content>hites only.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>These findings have implications for reducing health disparities among members of racial and ethnic minorities by identifying individual and service factors associated with treatment adherence, particularly for first\u2010time clients.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1475-6773.12031","type":"journal-article","created":{"date-parts":[[2013,1,28]],"date-time":"2013-01-28T05:21:58Z","timestamp":1359350518000},"page":"1450-1467","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":142,"title":["Disparities in Completion of Substance Abuse Treatment between and within Racial and Ethnic Groups"],"prefix":"10.1111","volume":"48","author":[{"given":"Erick G.","family":"Guerrero","sequence":"first","affiliation":[{"name":"School of Social Work University of Southern California Los Angeles CA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeanne C.","family":"Marsh","sequence":"additional","affiliation":[{"name":"School of Social Service Administration University of Chicago Chicago IL"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Duan","sequence":"additional","affiliation":[{"name":"School of Social Work University of Southern California Los Angeles CA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine","family":"Oh","sequence":"additional","affiliation":[{"name":"Los Angeles County Department of Public Health Substance Abuse Prevention and Control Alhambra CA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian","family":"Perron","sequence":"additional","affiliation":[{"name":"School of Social Work University of Michigan Ann Arbor MI"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Benedict","family":"Lee","sequence":"additional","affiliation":[{"name":"Los Angeles County Department of Public Health Substance Abuse Prevention and Control Alhambra CA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,1,27]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.drugalcdep.2006.05.009"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.drugalcdep.2006.05.008"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1081\/ADA\u2010120029870"},{"key":"e_1_2_6_5_1","volume-title":"Minority Clients Entering Substance Abuse Treatment for the First Time: 10 Year Trends","author":"Arndt S.","year":"2010"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1136\/jech.54.5.367"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1530\u20100277.2007.00515.x"},{"key":"e_1_2_6_8_1","unstructured":"Borys S..2011. \u201cPay for Performance Pilot with Drug Court Providers in New Jersey\u201d [accessed on October 10 2011]. 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