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Table 3 Summary of attrition rates at each stage of engagement and treatment

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

  Weighted mean percentage Un-weighted mean percentage Range Other literature reviews
IRS attrition 46% 51% 29% to 63%  
After assessment attrition 44% 33% 18% to 55% Pena et al.,1999[26] –27%
30-day tx attrition 29% 32% 13% to 58% Carroll, 1997[3] – 44%
Treatment incomplete SAMHSA[12] 56% NA 33% to 86%