title: Accuracy of influenza vaccination status in a computer-based immunization tracking system of a managed care organization.
abstract: Influenza vaccine safety and effectiveness studies conducted using electronic medical records rely on accurate assessment of influenza vaccination status. However, influenza immunization in non-traditional settings (e.g., the workplace) may not be captured in patient immunization tracking systems. We compared influenza vaccination status from electronic records with self-reported vaccination status for five hundred and two 50-79 years olds enrolled in a large managed care organization. Influenza vaccination status in the medical record had a high positive predictive value and specificity (both >99%). The negative predictive value was 80% and sensitivity was 78%. These data suggest that an electronic record of influenza vaccination reliably indicates immunization, while the absence of such a record is only moderately accurate, partly due to vaccines received in non-traditional settings.
authors.affiliation: Kaiser Permanente Southern California, 100 South Los Robles Ave., Pasadena, CA 91101, USA. lina.s.sy@kp.org
authors.forename: Lina S
authors.initials: LS
authors.lastname: Sy
authors.forename: In-Lu Amy
authors.initials: IL
authors.lastname: Liu
authors.forename: Zendi
authors.initials: Z
authors.lastname: Solano
authors.forename: T Craig
authors.initials: TC
authors.lastname: Cheetham
authors.forename: Marlene M
authors.initials: MM
authors.lastname: Lugg
authors.forename: Sharon K
authors.initials: SK
authors.lastname: Greene
authors.forename: Eric S
authors.initials: ES
authors.lastname: Weintraub
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Jacobsen
mesh_terms: D000368:Aged; D002140:California; D003430:Cross-Sectional Studies; D057286:Electronic Health Records / Q000592:standards*; D005260:Female; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control*; D008297:Male; D008329:Managed Care Programs / Q000706:statistics & numerical data; D008875:Middle Aged; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D014611:Vaccination / Q000706:statistics & numerical data*
chemical_list: D007252:Influenza Vaccines