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  • Title: Feasibility and outcome of substitution treatment of heroin-dependent patients in specialized substitution centers and primary care facilities in Germany: a naturalistic study in 2694 patients.
    Author: Wittchen HU, Apelt SM, Soyka M, Gastpar M, Backmund M, Gölz J, Kraus MR, Tretter F, Schäfer M, Siegert J, Scherbaum N, Rehm J, Bühringer G.
    Journal: Drug Alcohol Depend; 2008 Jun 01; 95(3):245-57. PubMed ID: 18337025.
    Abstract:
    BACKGROUND: In many countries, buprenorphine and methadone are licensed for the maintenance treatment (MT) of opioid dependence. Despite many short-term studies, little is known about the long-term (12-month) effects of these treatments in different settings, i.e. primary care-based (PMC) and specialized substitution centers (SSCs). OBJECTIVES: To describe over a period of 12 months: (1) mortality, retention and abstinence rates; (2) changes in concomitant drug use, somatic and mental health; and (3) to explore differences between different types of provider settings. METHODS: 12-Month prospective-longitudinal naturalistic study with four waves of assessment in a prevalence sample of N=2694 maintenance patients, recruited from a nationally representative sample of N=223 substitution physicians. RESULTS: The 12-month retention rate was 75%; the mortality rate 1.1%. 4.1% of patients became "abstinent" during follow-up. 7% were referred to drug-free addiction treatment. Concomitant drug use decreased and somatic health status improved. No significant improvements were observed for mental health and quality of life. When controlling for initial severity, small PMC settings revealed better retention, abstinence and concomitant drug use rates. CONCLUSION: The study underlines the overall 12-month effectiveness of various forms of agonist MT. Findings reveal relatively high retention rates, low mortality rates, and improvements in most 12-month outcome domains, except for mental health and quality of life. PMC settings appear to be a good additional option to improve access to MTs.
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