title: Evaluation of self-reported and registry-based influenza vaccination status in a Wisconsin cohort.
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.
authors.affiliation: Marshfield Clinic Research Foundation, 1000 North Oak Avenue, Marshfield, WI 54449, USA. irving.stephanie@marshfieldclinic.org
authors.forename: Stephanie A
authors.initials: SA
authors.lastname: Irving
authors.forename: James G
authors.initials: JG
authors.lastname: Donahue
authors.forename: David K
authors.initials: DK
authors.lastname: Shay
authors.forename: Tina L
authors.initials: TL
authors.lastname: Ellis-Coyle
authors.forename: Edward A
authors.initials: EA
authors.lastname: Belongia
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007223:Infant; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012042:Registries / Q000706:statistics & numerical data*; D014922:Wisconsin / Q000453:epidemiology; D055815:Young Adult
chemical_list: D007252:Influenza Vaccines