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Table 4 Retention rates across four stages of engagement & treatment

From: Examining attrition rates at one specialty addiction treatment provider in the United States: a case study using a retrospective chart review

Authors & date Sample size IRS Assessment Retained Treatment complete
Longi et al., 1991[17] 1567 1118 (71%) 600 (44%)*   386 (28%)
Arfken et al., 2001[28] 2471   2026 (82%) 1766 (71%) 989 (40%)
Claus & Kindleberger, 2002[30] 260   195 (75%) 156 (60%)  
Kleinman et al., 1992[20] 148   86 (58%) 36 (24%)  
Pinto et al., 2011[33] 346   286 (83%) 201 (58%)  
  1. *= 209 individuals were ineligible for services after assessment, which lowered the base sample to 1358.