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Communications to Promote Interest and Confidence in COVID-19 Vaccines.

Thorpe A, Fagerlin A, Drews FA, Butler J, Stevens V, Riddoch MS, Scherer LD. Communications to Promote Interest and Confidence in COVID-19 Vaccines. American Journal of Health Promotion : AJHP. 2022 Jul 1; 36(6):976-986.

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Abstract:

PURPOSE: Communicating about COVID-19 vaccine side effects and efficacy is crucial for promoting transparency and informed decision-making, but there is limited evidence on how to do so effectively. DESIGN: A within-subjects experiment. SETTING: Online survey from January 21 to February 6, 2021. SUBJECTS: 596 US Veterans and 447 non-Veterans. INTERVENTION: 5 messages about COVID-19 vaccine side effects and 4 messages about COVID-19 vaccine efficacy. MEASURES: COVID-19 vaccine interest (1 = "I definitely do NOT want the vaccine" to 7 = "I definitely WANT the vaccine" with the midpoint 4 = "Unsure"). Confidence about COVID-19 vaccine efficacy (1 = "Not at all confident," 2 = "Slightly confident," 3 = "Somewhat confident," 4 = "Moderately confident," 5 = "Extremely confident"). RESULTS: Compared to providing information about side effects alone ( = 5.62 [1.87]), messages with additional information on the benefits of vaccination = 5.77 [1.82], < .001, = .25), reframing the likelihood of side effects = 5.74 [1.84], < .001, = .23), and emphasizing that post-vaccine symptoms indicate the vaccine is working = 5.72 [1.84], < .001, = .17) increased vaccine interest. Compared to a vaccine efficacy message containing verbal uncertainty and an efficacy range ( = 3.97 [1.25]), messages conveying verbal certainty with an efficacy range ( = 4.00 [1.24], = .042, = .08), verbal uncertainty focused on the upper efficacy limit ( = 4.03 [1.26], < .001, = .13), and communicating the point estimate with certainty ( = 4.02 [1.25], < .001, = .11) increased confidence. Overall, Veteran respondents were more interested ( = 5.87 [1.72] vs = 5.45 [2.00], < .001, = .22) and confident ( = 4.13 [1.19] vs = 3.84 [1.32], < .001, = .23) about COVID-19 vaccines than non-Veterans. CONCLUSIONS: These strategies can be implemented in large-scale communications (e.g., webpages, social media, and leaflets/posters) and can help guide healthcare professionals when discussing vaccinations in clinics to promote interest and confidence in COVID-19 vaccines.





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