OBJECTIVE: To determine the impact of a vaccination reminder in an electronic health record supplemented with data from an immunization information system (IIS). METHODS: A noninterruptive @entity683 vaccination reminder, based on a real-time query of hospital and city IIS, was used at 4 urban, academically affiliated clinics serving a low-income population. Using a randomized cluster-crossover design, each study site had "on" and "off" period during the fall and winter of 2011-2012. Influenza vaccination during a clinic visit was assessed for 6-month to 17-year-old @entity1 . To assess sustainability, the reminder was active at all sites during the 2012-2013 season. RESULTS: In the 2011-2012 season, 8481 unique non-up-to-date @entity1 had visits. Slightly more non-up-to-date @entity1 seen when the reminder was 'on' were vaccinated than when 'off' (76.2% vs 73.8%; P = .027). Effects were seen in the winter (67.9% vs 62.2%; P = .005), not fall (76.8% vs 76.5%). The reminder also increased documentation of the reason for vaccine non-administration (68.1% vs 41.5%; P < .0001). During the 2011-2012 season, the reminder displayed for 8630 unique visits, and clinicians interacted with it in 83.1% of cases where @entity1 required vaccination. During the 2012-2013 season, it displayed for 22   248 unique visits; clinicians interacted with it in 84.8% of cases. CONCLUSIONS: An IIS-linked @entity683 vaccination reminder increased vaccination later in the winter when fewer vaccine doses are usually given. Although the reminder did not require clinicians to interact with it, they frequently did; utilization did not wane over time.

Registry-linked electronic XXXX vaccine provider reminders: a cluster-crossover trial.

@entity1 :: ('9606', 'Species') :: ['patients', 'children'] @entity683 :: ('MESH:D007251', 'Disease') :: ['influenza']
@entity683 :: (MESH:D007251,Disease) :: ['influenza']
