BACKGROUND Promising health interventions tested in pilot studies will only achieve population-wide impact if they are implemented at scale across communities and health systems. Scaling up effective health interventions is vital as not doing so denies the community the most effective services and programmes. However, there remains a paucity of practical tools to assess the suitability of health interventions for scale-up. The Intervention Scalability Assessment Tool (ISAT) was developed to support policy-makers and practitioners to make systematic assessments of the suitability of health interventions for scale-up. METHODS The ISAT was developed over three stages; the first stage involved a literature review to identify similar tools and frameworks that could be used to guide scalability assessments, and expert input to develop draft ISAT content. In the second stage, the draft ISAT tool was tested with end users. The third stage involved revising and re-testing the ISAT with end users to further refine the language and structure of the final ISAT. RESULTS A variety of information and sources of evidence should be used to complete the ISAT. The ISAT consists of three parts. Part A: 'setting the scene' requires consideration of the context in which the intervention is being considered for scale-up and consists of five domains, as follows: (1) the problem; (2) the intervention; (3) strategic/political context; (4) evidence of effectiveness; and (5) intervention costs and benefits. Part B asks users to assess the potential implementation and scale-up requirements within five domains, namely (1) fidelity and adaptation; (2) reach and acceptability; (3) delivery setting and workforce; (4) implementation infrastructure; and (5) sustainability. Part C generates a graphical representation of the strengths and weaknesses of the readiness of the proposed intervention for scale-up. Users are also prompted for a recommendation as to whether the intervention (1) is recommended for scale-up, (2) is promising but needs further information before scaling up, or (3) does not yet merit scale-up. CONCLUSION The ISAT fills an important gap in applied scalability assessment and can become a critical decision support tool for policy-makers and practitioners when selecting health interventions for scale-up. Although the ISAT is designed to be a health policy and practitioner tool, it can also be used by researchers in the design of research to fill important evidence gaps.

中文翻译：

---

干预可扩展性评估工具：卫生政策制定者和实施者的决策支持工具。

背景 在试点研究中测试的有希望的健康干预措施只有在跨社区和卫生系统大规模实施时才能实现全人群的影响。扩大有效的卫生干预措施至关重要，因为不这样做会剥夺社区最有效的服务和计划。然而，仍然缺乏实用工具来评估卫生干预措施是否适合扩大规模。干预可扩展性评估工具 (ISAT) 的开发旨在支持政策制定者和从业人员对卫生干预措施是否适合扩大规模进行系统评估。方法 ISAT 的开发分为三个阶段；第一阶段涉及文献回顾，以确定可用于指导可扩展性评估的类似工具和框架，和专家意见，以制定 ISAT 内容草案。在第二阶段，ISAT 工具草案在最终用户中进行了测试。第三阶段涉及与最终用户一起修改和重新测试 ISAT，以进一步完善最终 ISAT 的语言和结构。结果 应使用各种信息和证据来源来完成 ISAT。ISAT由三个部分组成。A 部分：“设定场景”需要考虑考虑扩大干预的背景，包括以下五个领域：（1）问题；（二）干预；(3) 战略/政治背景；（四）有效性证据；(5) 干预成本和收益。B 部分要求用户评估五个领域内的潜在实施和扩展要求，即 (1) 保真度和适应性；(2) 可达性和可接受性；(3) 交付环境和劳动力；(4) 实施基础设施；(5) 可持续性。C 部分生成了一个图表，说明了所提议的干预措施准备好扩大规模的优势和劣势。还会提示用户就干预措施是否 (1) 建议扩大规模，(2) 有希望但在扩大规模之前需要进一步信息，或 (3) 尚不值得扩大规模提出建议。结论 ISAT 填补了应用可扩展性评估的一个重要空白，并且可以成为决策者和从业者在选择健康干预措施以扩大规模时的关键决策支持工具。尽管 ISAT 旨在成为一种卫生政策和实践工具，但研究人员也可以在研究设计中使用它来填补重要的证据空白。