Computer-generated mailed reminders for influenza immunization: a clinical trial

Abstract

A randomized, single-blind, controlled trial was performed at a community health center to measure the impact of computer-generated reminders mailed to patients on the rate of influenza immunization. High-risk patients were randomized to one of three groups: 1) usual care, 2) one reminder letter, offering free influenza immunization without an appointment, or 3) two sequential reminder letters, offering the same. The reminders did not significantly affect rates of influenza immunization. Analysis of the combined groups indicates that an appointment with a primary care provider remains the most reliable method of immunizing high-risk patients at this health center.