Development and Validation of a Measure of Self-Efficacy for Advance Care Planning

Medical care received at end-of-life is often not aligned with individuals' values and care preferences. Much can get in the way of an individual communicating and documenting their preferences to care providers and close others, even if it is a goal to do so. The objective of this work was to develop a measure of Advance Care Planning Self-Efficacy (ACP SE) focused on three important behaviors: completing a living will, documenting a healthcare agent, and discussing quality versus quantity of life issues. Measure development was framed by the Transtheoretical Model (TTM) of behavior change. Following the completion of focus groups and formative qualitative work, an independent sample (