Predictors of concurrent heroin use among patients on opioid maintenance treatment in France: a multilevel study over 11 years.

The data reveal a stable number of outpatients following an OMT protocol over the past decade, alongside a decreasing trend in heroin use.

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Although an encouraging trend, the proportion of people who use heroin (PWUH) remains high: overall, more than half of the patients stated they had used heroin during the past 30 days (57.8% in 2010 vs. 49.3% in 2020).

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