When do persuasive messages on vaccine safety steer COVID-19 vaccine acceptance and recommendations? Behavioural insights from a randomised controlled experiment in Malaysia.

INTRODUCTION: Vaccine safety is a primary concern among vaccine-hesitant individuals. We examined how seven persuasive messages with different frames, all focusing on vaccine safety, influenced Malaysians to accept the COVID-19 vaccine, and recommend it to individuals with different health and age profiles; that is, healthy adults, the elderly, and people with pre-existing health conditions. METHODS: A randomised controlled experiment was conducted from 29 April to 7 June 2021, which coincided with the early phases of the national vaccination programme when vaccine uptake data were largely unavailable. 5784 Malaysians were randomly allocated into 14 experimental arms and exposed to one or two messages that promoted COVID-19 vaccination. Interventional messages were applied alone or in combination and compared against a control message. Outcome measures were assessed as intent to both take the vaccine and recommend it to healthy adults, the elderly, and people with pre-existing health conditions, before and after message exposure. Changes in intent were modelled and we estimated the average marginal effects based on changes in the predicted probability of responding with a positive intent for each of the four outcomes. RESULTS: We found that persuasive communication via several of the experimented messages improved recommendation intentions to people with pre-existing health conditions, with improvements ranging from 4 to 8 percentage points. In contrast, none of the messages neither significantly improved vaccination intentions, nor recommendations to healthy adults and the elderly. Instead, we found evidence suggestive of backfiring among certain outcomes with messages using negative attribute frames, risky choice frames, and priming descriptive norms. CONCLUSION: Message frames that briefly communicate verbatim facts and stimulate rational thinking regarding vaccine safety may be ineffective at positively influencing vaccine-hesitant individuals. Messages intended to promote recommendations of novel health interventions to people with pre-existing health conditions should incorporate safety dimensions. TRIAL REGISTRATION NUMBER: NCT05244356.

Patient-reported financial toxicity, quality of life, and health behaviors in insured US cancer survivors.

PURPOSE: Fighting cancer is a costly battle, and understanding the relationship between patient-reported financial toxicity (FT) and health outcomes can help inform interventions for post-treatment cancer survivors. METHODS: Stages I-III solid tumor, insured US cancer survivors (N = 103) completed a survey addressing FT (as measured by the standardized COST measure) and clinically relevant health outcomes (including health-related quality of life [HRQOL] and adherence to recommended survivorship health behaviors). Univariate and multivariate analyses were used to assess demographic and disease-specific correlates of FT, and to assess the predictive value of FT on HRQOL and adherence to survivorship health behaviors. RESULTS: Approximately 18% of respondents noted FT levels associated with significant financial burden. In univariate analyses, after correcting for multiple comparisons, greater FT was associated with unpartnered status, non-retirement, and lower level of educational attainment. Greater FT was also significantly associated with HRQOL components of anxiety, fatigue, pain, physical functioning, and social functioning. FT was not significantly associated with any measured survivorship health behaviors. In multivariate analyses, FT was found to be a meaningful predictor of patient-reported anxiety, fatigue, physical functioning, and social functioning above and beyond theoretically and statistically relevant demographic characteristics. CONCLUSIONS: Although overall levels of FT were lower among cancer survivors in this sample, as compared with active treatment patients assessed in previous studies, financial burden continued to be a concern for a significant minority of cancer survivors and was associated with components of reduced HRQOL. Further research is needed to understand FT among underinsured survivors and those treated in community oncology settings. IMPLICATIONS FOR CANCER SURVIVORS: Incorporation of FT assessment into survivorship care planning could enhance clinical assessment of survivors' FT vulnerability, help address the dynamic and persistent challenges of survivorship, and help identify those most in need of intervention across the cancer care continuum.