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 2×2×2 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.