Supporting public involvement in defining estimands: a practical tool accessibly explaining the five key attributes of an estimand

We provide a co-developed tool for researchers and public partners to use to facilitate the involvement of public partners in devising estimands. The tool explains the 5 attributes of an estimand using accessible terms proposed by public partners. It can be used in conjunction with the previously developed tool, which introduces what an estimand is and why it matters, to facilitate discussions with public partners on defining estimands during trial planning. The tools can also be used by other stakeholders including researchers unfamiliar with the estimand framework and those who find the scientific estimand attribute terms inaccessible.