Cancer patients' trust as a motivator to seek a second opinion and its effects on trust.

Cancer patients may seek a second opinion (SO) driven by reduced trust in their own providers. Their trust may be diminished or reinforced through the SO. This study aimed to assess (1) what proportion of patients seek SOs motivated by lacking trust and how trust changes over time; (2) whether patients' trust differs by the outcome of the SO (i.e. similar/different opinion); and (3) how communication during the SO affects trust. A longitudinal mixed methods study including self-report assessments before (T₀), immediately following (T₁), and two months after the SO (T₂). SO consultations (N = 62) were audio recorded, and patient-oncologist communication about the referring oncologist was coded. Patient-reported motives and their trust in referring oncologists. Reduced trust motivated 21% of patients to seek a SO. Most patients criticised their referring oncologist. Consulting oncologists generally defended their colleagues, but such affirmation was unrelated to patients' subsequent trust. Over time, trust did not change substantially. Yet, it was restored in patients motivated by impaired trust, and remained low for patients receiving a different medical outcome. Patients need support to more constructively discuss their treatment relationship. Oncologists need support in providing independent SOs without harming trust relations. [ABSTRACT FROM AUTHOR]