The Role of Information and Nudges on Advance Directives and End-of-Life Planning: Evidence From a Randomized Trial.

Despite the substantial personal and economic implications of end-of-life decisions, many individuals fail to document their wishes, which often leads to patient dissatisfaction and unnecessary medical spending. We conducted a randomized trial of 1,200 patients aged 55 years and older to facilitate advance directive (AD) completion and better understand why patients fail to engage in high-value planning. We found that including a physical AD form with paper letters as a nudge to decrease hassle costs increased AD completion by 9.0 percentage points (95% confidence interval [CI] = [4.2, 13.9] percentage points). The intervention was especially effective for individuals aged 70 years and older, as AD completion increased by 17.5 percentage points (95% CI = [5.7, 9.4] percentage points). When compared with the impact of costless electronic reminders, each additional AD completion from the letter interventions costs as little as US$37. Our findings suggest that simple, inexpensive interventions with paper communication as behavioral nudges can be effective, especially in older populations.