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    Identification of preliminary core outcome domains for communication about childhood vaccination: An online Delphi survey

    Publication date: 22 October 2018

    Source: Vaccine, Volume 36, Issue 44

    Author(s): Jessica Kaufman, Rebecca Ryan, Simon Lewin, Xavier Bosch-Capblanch, Claire Glenton, Julie Cliff, Angela Oyo-Ita, Artur Manuel Muloliwa, Afiong Oku, Heather Ames, Gabriel Rada, Yuri Cartier, Sophie Hill

    Abstract
    Background

    Communication interventions for childhood vaccination are promising strategies to address vaccine hesitancy, but current research is limited by the outcomes measured. Most studies measure only vaccination-related outcomes, with minimal consideration of vaccine hesitancy-relevant intermediate outcomes. This impedes understanding of which interventions or elements are effective.

    It is also unknown which outcomes are important to the range of stakeholders affected by vaccine hesitancy. Outcome selection shapes the evidence base, informing future interventions and trials, and should reflect stakeholder priorities.

    Therefore, our aim was to identify which outcome domains (i.e. broad outcome categories) are most important to different stakeholders, identifying preliminary core outcome domains to inform evaluation of three common vaccination communication types: (i) communication to inform or educate, (ii) remind or recall, and (iii) enhance community ownership.

    Methods

    We conducted a two-stage online Delphi survey, involving four stakeholder groups: parents or community members, healthcare providers, researchers, and government or non-governmental organisation representatives. Participants rated the importance of eight outcome domains for each of the three communication types. They also rated specific outcomes within one domain (“attitudes or beliefs”) and provided feedback about the survey.

    Results

    Collectively, stakeholder groups prioritised outcome domains differently when considering the effects of different communication types. For communication that aims to (i) inform or educate, the most important outcome domain is “knowledge or understanding”; for (ii) reminder communication, “vaccination status and behaviours”; and for (iii) community engagement communication, “community participation”. All stakeholder groups rated most outcome domains as very important or critical. The highest rated specific outcome within the “attitudes or beliefs” domain was “trust”.

    Conclusion

    This Delphi survey expands the field of core outcomes research and identifies preliminary core outcome domains for measuring the effects of communication about childhood vaccination. The findings support the argument that vaccination communication is not a single homogenous intervention – it has a range of purposes, and vaccination communication evaluators should select outcomes accordingly.

    https://www.sciencedirect.com/journal/vaccine

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