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Public health in managed care: a randomized controlled trial of the effectiveness of postcard reminders
A E Clayton1, L A McNutt, H L Homestead
1Kaiser Permanente Northeast Division, Quality Management Department, Latham, NY 12110, USA. allison.clayton@kp.org
Objectives:
This study evaluated the effectiveness of an annual public health intervention in a managed care setting.
Methods:
Managed care organization members 65 years and older who received influenza immunization in 1996 were randomized to an intervention group (mailed a postcard reminder to receive an influenza vaccination in 1997) or a control group (no postcard). Vaccination rates for both groups were assessed monthly.
Results:
Members receiving the intervention were no more likely to be immunized (78.6%) than members of the control group (77.2%, P = .222). Members were vaccinated at the same pace regardless of vaccination history and postcard intervention status.
Conclusions:
Postcard reminders were not an effective intervention among seniors who had been vaccinated the previous year.
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