Primary End Point Measures
POSITIVE
Primary end points were the absolute proportions of respondents showing positive change in vaccination intention category and benefit-to-harm assessment category. Positive change could range from a change of 1 category (eg, from “unsure” to “probably”) to 3 categories (from “probably not” to “definitely”) for vaccination intentions and to 4 categories (from “The harms … clearly outweigh the benefits” to “The benefits … clearly outweigh the harms”) for benefit-to-harm assessment. As mentioned earlier, those stating that they would “definitely” or “definitely not” get vaccinated at baseline were excluded from the sample of vaccine-hesitant respondents, which is why the maximum potential change of the 2 end points differed. Secondary end points were negative changes from baseline to postintervention and associations of primary end points with demographic characteristics and attitudes to COVID-19 vaccination.