Author(s): Irving SA, Donahue JG, Shay DK, EllisCoyle TL, Belongia EA
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Abstract We evaluated influenza vaccination status as determined by self-report and a regional, real-time immunization registry during two influenza seasons when subjects were enrolled in a study to estimate vaccine effectiveness. We enrolled 2907 patients during the two consecutive seasons. The sensitivity and specificity of self-reported influenza vaccination when compared to immunization registry records were 95\% and 90\%, respectively. The positive predictive value of self-reported vaccination was 89\% and negative predictive value was 96\%. In our study population, self-reported influenza vaccine status was a sensitive and fairly specific indicator of actual vaccine status. Misclassification was more common among young children.
This article was published in Vaccine
and referenced in Journal of Vaccines & Vaccination