Group Intervention on Vaccine Confidence

Group Intervention to Improve Vaccine Confidence and Vaccination in a Community Healthcare System: A Mixed Methods Study Design

This study has one primary objective and two secondary objectives, with an overall goal of understanding barriers to vaccination and vaccination confidence, so that effective interventional strategies can be further developed and tested to improve vaccination outcomes in a community healthcare setting.

The study will use a mixed methods approach, combining focus group discussion, virtual interviews with healthcare professionals, cross-sectional survey on vaccination attitude, and clinic-based intervention with a cluster randomized controlled trial design for the quantitative stage. They study will also follow up patients with interviews after the quantitative stage completes.

Qualitative study standards:

Inclusion Criteria:

• having used MultiCare's services in the past 12 months or whose minor child(ren) has/have used MultiCare's services in the past 12 months, and who have been involved in the child(ren)'s immunization decision-making as a caregiver
• current residential location in Washington State
• willing to participate

Exclusion Criteria:

• terminal disease (to be decided)
• cognitive impairment
• main immune deficiency conditions

Quantitative study standards:

We will randomly (and) equally select clinics from 1) Puget Sound and 2) Eastern Washington areas. Since the intervention is on facility level (group intervention), instead of at patient level, blinding will also be impractical. We plan to use stratified random allocation within the pediatric (n1 = 2) or adult stratum (n2 = 4), to decide which sites will get the intervention.