Comparative Effectiveness Trial of Two Reminder/Recall Methods to Increase Immunization Rates in Young Children

Not Applicable

Completed

Brief Summary: The purpose of this study is to determine if a collaborative centralized population-based reminder/recall intervention is more effective than a traditional practice-based reminder/recall intervention at increasing immunizations among young children.

Detailed Description: The study proposed is of immense importance in directing future methodology for bringing children who have not received needed immunizations up to date. The proposed study builds on the success of a previous trial and incorporates data from providers and patients to further improve the intervention. In this study the investigators aim to increase the effectiveness, cost effectiveness, and acceptability to practices and families of population-based R/R by introducing a strong private-public collaboration and maximizing health information technologies that allow practices to interface with Colorado's Immunization Services System (CIIS). Two real-world approaches will be compared: one approach will provide primary care practices the tools to conduct recall and educational interventions. In the other approach, population-based centralized recall by the state immunization registry will be conducted in collaboration with practices. Determining which of these methods is most effective in reaching the most children and comparing the cost of each will provide data critical in guiding future national efforts to assure that children entering school are fully vaccinated. Because the trial will be conducted at the level of both urban and rural counties throughout the state and will include all types of providers, the investigators expect our findings to be nationally generalizable.

Recruitment & Eligibility

Inclusion Criteria

19-35 months at time of recall
has an address in a specified study county listed in the state immunization registry
child is in need of at least one immunization at time of study

Exclusion Criteria

Arm && Interventions

Group	Intervention	Description
Practice-based Recall	Practice-based Recall	Practice-based Recall

Primary Outcome Measures

Name	Time	Method
1) Change in up-to-date rates for 19- to 35-month-olds (who needed an immunization at baseline) in collaborative population-based counties compared to practice-based intervention counties	every 6 months for 2 years	The definition of up-to-date is based on the national Advisory Committee on Immunization Practices(ACIP)recommended series of antigens (4:3:1:3:3:1:3) to be received by the age of 19-20 months. Three different cohorts of children aged 19-35 months will be assessed across the 3 year study period. Outcomes from each cohort will be assessed 6 months post-intervention.
2) Change in percent of children (who needed an immunization at baseline) who received any additional vaccines in each type of intervention county.	every 6 months for two years	Number (percent) of children who received ANY vaccination within the 6 month intervention period.

Secondary Outcome Measures

Name	Time	Method
Cost Analysis of Collaborative Population-based Recall versus Practice-based Recall	2 years	Number (percent) of identified children that became up-to-date for recommended immunizations. Number (percent) of shots delivered to children needing immunizations. Number (percent) or providers (sites) that conducted practice-based reminder recall.

Locations (2): University of Colorado Denver
🇺🇸
Aurora, Colorado, United States
Colorado Immunization Information System
🇺🇸
Denver, Colorado, United States

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