Opioid agonist treatment (OAT) is the evidence‐based standard of care for people with opioid use disorder. In British Columbia, Canada, only social assistance registrants received full coverage for OAT prior to the introduction of the Pharmacare Plan G coverage expansion on February 1st, 2017. We aimed to determine the effect of the coverage expansion on OAT initiation, re‐initiation, and retention. Using linked population‐level data, we executed a difference‐in‐differences analysis to compare outcomes of individuals eligible for the additional coverage and social assistance registrants already receiving the most generous coverage for OAT prior to the policy change, adjusting for individual and prescriber characteristics. We found Plan G coverage expansion significantly increased OAT retention. Specifically, coverage expansion decreased the number of OAT episode discontinuations by 12.8% (95% CI: 8.4%, 17.2%).

中文翻译：

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不列颠哥伦比亚省扩大 Pharmacare 覆盖范围对阿片类激动剂治疗的影响

阿片类药物激动剂治疗 (OAT) 是阿片类药物使用障碍患者的循证护理标准。在加拿大不列颠哥伦比亚省，在 2017 年 2 月 1 日引入 Pharmacare Plan G 覆盖范围扩展之前，只有社会援助注册者获得了 OAT 的全覆盖。我们旨在确定覆盖范围扩展对 OAT 启动、重新启动、和保留。使用关联的人口水平数据，我们执行了差异中的差异分析，以比较有资格获得额外保险的个人和在政策变化之前已经获得最慷慨 OAT 保险的社会援助注册者的结果，并根据个人和开处方者的特征进行调整. 我们发现 G 计划的覆盖范围扩大显着提高了 OAT 保留率。具体来说，