Randomized Trial of the Choosing Wisely Consumer Questions and a Shared Decision-Making Video Intervention on Decision-Making Outcomes

Background Despite widespread use, there are few studies evaluating the consumer Choosing Wisely questions. Methods We evaluated the impact of the Choosing Wisely questions on consumers' decision-making outcomes. Adults living in Australia were presented with a hypothetical low-value care scenario. Using a 2x2x2 between-subjects factorial design, they were randomized to either the Choosing Wisely questions ("Questions"), a shared decision-making (SDM) preparation video ("Video"), both interventions, or control (no intervention). Primary outcomes were 1) self-efficacy to ask questions and be involved in decision-making and 2) intention to engage in SDM. Results A total of 1,439 participants (45.6% with "inadequate" health literacy) were eligible and included in the analysis. Intention to engage in SDM was higher in people randomized to the Video (mean difference [MD] = 0.24 [scale 0-6], 95% confidence interval [CI]: 0.14, 0.35), Questions (MD = 0.12, 95% CI: 0.01, 0.22), and both interventions (MD = 0.33, 95% CI: 0.23-0.44, P < 0.001, d = 0.28) compared with control. Combining interventions had a greater impact than presenting the Questions alone (MD = 0.22, 95% CI: 0.11, 0.32; P < 0.001). Those who received the Video or both interventions reported lower intention to follow the low-value treatment plan without further questioning (all P < 0.05) and more positive attitudes toward SDM (all P < 0.05) compared with control. Intervention acceptability was high in all study arms (>80%), but proactive access was low (1.7%-20.8%). Compared with control, participants who received one or both interventions asked more questions that mapped to the Choosing Wisely questions (all P < .001). There were no main effects of either intervention on self-efficacy or knowledge. Conclusions The Choosing Wisely questions and a video to promote SDM may improve intention to engage in SDM and support patients in identifying questions that align with the Choosing Wisely campaign (with some additional benefits of the video intervention).