Explaining the Process of Determining Futility Increases Lay Public Acceptance.

National guidelines have laid out a process to conflict resolution in cases of potentially inappropriate medical interventions. To determine the association between information about a process-based approach and lay public perceptions of the appropriateness of withholding medically inappropriate interventions. Respondents from a nationwide sample completed a survey with two adult intensive care unit-based vignettes: one about advanced cancer where doctors told the family that additional chemotherapy would not be offered, and a second case of multiorgan failure after brain hemorrhage where dialysis would not be offered. Participants were randomly assigned to see or not see information about a detailed process for the determination to withhold (second opinion, ethics consultation, exploring transfer to another institution). The primary outcome was the perceived appropriateness of not providing the treatment (four-point scale, dichotomized for analysis, modified Poisson regression), and the secondary outcome was the negative emotional reaction to the case (positive and negative affect schedule, range 1-5, higher is greater negative emotional response, linear regression). A total of 1,191 respondents were included. Providing detailed process information increased the perceived appropriateness of withholding treatment by approximately 10 percentage points in each vignette: (chemotherapy, 75.7-85.4%; dialysis, 68.0-79.3%). Process information remained associated with perceived appropriateness of withholding treatment after adjustment for order effects and prespecified respondent characteristics (chemotherapy: prevalence ratio, 1.13; 95% confidence interval [CI], 1.07-1.19) (dialysis: prevalence ratio, 1.17; 95% CI, 1.10-1.25). Process information was not associated with emotional response to the cases (chemotherapy: β = -0.04; 95% CI, -0.16 to 0.09) (dialysis: β = -0.02; 95% CI, -0.14 to 0.10; both adjusted for order effects). Providing process-based conflict resolution information increased public acceptance of determinations of medical futility, supporting the practice outlined in national consensus statements.