Validity of self-reported influenza and pneumococcal vaccination status among a cohort of hospitalized elderly inpatients

Abstract Use of self-reported vaccination status is commonplace in assessing vaccination coverage for public health programs and individuals, yet limited validity data exist. We compared self-report with provider records for pneumococcal (23vPPV) and influenza vaccine for 4887 subjects aged ≥65 year...

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Bibliographic Details
Published in:Vaccine 2007-06, Vol.25 (25), p.4775-4783
Main Authors: Skull, Susan A, Andrews, Ross M, Byrnes, Graham B, Kelly, Heath A, Nolan, Terence M, Brown, Graham V, Campbell, Donald A
Format: Article
Language:English
Subjects:
Aged
Allergy and Immunology
Applied microbiology
Bacteriology
Bias
Biological and medical sciences
Case-Control Studies
Cohort Studies
Confidence intervals
Consent
Female
Fundamental and applied biological sciences. Psychology
Humans
Immunization
Influenza
Influenza vaccines
Influenza, Human - prevention & control
Inpatients
Male
Microbiology
Middle Aged
Miscellaneous
Pneumococcal Infections - prevention & control
Pneumococcal vaccines
Predictive Value of Tests
Public health
Reproducibility of Results
Streptococcus pneumoniae
Studies
Vaccination - statistics & numerical data
Vaccines
Vaccines, antisera, therapeutical immunoglobulins and monoclonal antibodies (general aspects)
Validity
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Summary:Abstract Use of self-reported vaccination status is commonplace in assessing vaccination coverage for public health programs and individuals, yet limited validity data exist. We compared self-report with provider records for pneumococcal (23vPPV) and influenza vaccine for 4887 subjects aged ≥65 years from two Australian hospitals. Self-reported influenza vaccination status had high sensitivity (98%), positive predictive value (PPV) (88%) and negative predictive value (NPV) (91%), but low specificity (56%). Self-reported 23vPPV (previous 5 years) had a sensitivity of 84%, specificity 77%, PPV 85% and NPV 76%. Clinicians can be reasonably confident of self-reported influenza vaccine status, and for positive self-report for 23vPPV in this setting. For program evaluation, self-reported influenza vaccination coverage among inpatients overestimates true coverage by about 10% versus 1% for 23vPPV. Self-report remains imperfect and whole-of-life immunisation registers a preferable goal.
ISSN:0264-410X
1873-2518
DOI:10.1016/j.vaccine.2007.04.015