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

Susan Anne Skull, Ross Andrews, G BYRNES, H KELLY, Terry Nolan, Graham Brown, David Campbell

Research output: Contribution to journalArticleResearchpeer-review


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. � 2007 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)4775-4783
Number of pages9
Issue number25
Publication statusPublished - 2007


  • Pneumococcus vaccine
  • aged
  • article
  • clinical trial
  • cohort analysis
  • controlled clinical trial
  • controlled study
  • elderly care
  • female
  • health program
  • hospital patient
  • hospitalization
  • human
  • influenza
  • intermethod comparison
  • major clinical study
  • male
  • multicenter study
  • priority journal
  • randomized controlled trial
  • self report
  • sensitivity and specificity
  • statistical analysis
  • Streptococcus infection
  • validation process
  • Aged
  • Case-Control Studies
  • Cohort Studies
  • Female
  • Humans
  • Influenza, Human
  • Inpatients
  • Male
  • Middle Aged
  • Pneumococcal Infections
  • Predictive Value of Tests
  • Reproducibility of Results
  • Vaccination

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