Journal
VACCINE
Volume 27, Issue 47, Pages 6546-6549Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2009.08.050
Keywords
Influenza vaccine; Vaccine registry; Self-reported vaccination status
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Funding
- Centers for Disease Control and Prevention [1 U01 C1000192-01]
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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. (C) 2009 Elsevier Ltd. All rights reserved.
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