Validity of self-reported pneumococcal vaccination status in the elderly in Spain

José María Bayas, Conchita Izquierdo, Laura Ruiz, Xavier Sintes, Dolores Sousa, José Miguel Celorrio, Wenceslao Varona, Jordi Carratalà, Manel Nebot, Joan Batalla, Silvia Sugrañes, Adriana Manzur, Ángel Terren, Carmen García, Esperanza Clemente, Susana Rivera, Isabel Justo, Ana Arévalo, Lluís Salleras, Ángela Domínguez

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The objective of this study was to evaluate the validity of information reported by the elderly on 23-valent pneumococcal polysaccharide vaccine (23vPPV) vaccination status. A cross-sectional, observational study was carried out in patients aged ≥65 years admitted to five Spanish hospitals. Data on 23vPPV vaccination history were obtained through interview of the patient or close relative and review of written medical information. The validity of the patient self-report was compared to the written medical information by calculation of the sensitivity, specificity, concordance, positive predictive value (PPV) and negative predictive value (NPV). A total of 2484 patients were initially included of whom 1814 patients (73%) responded about their vaccination status. The global sensitivity of the patient self-report was 0.74 and the specificity 0.95. The PPV was 0.92, the NPV 0.84 and the concordance 87. Vaccination cards and centralized vaccination registries in primary health care centres and hospitals should be potentiated in order to ensure that neither more nor less vaccinations are administered than are necessary.

Original languageEnglish (US)
Pages (from-to)4560-4564
Number of pages5
Issue number34
StatePublished - Jul 23 2009
Externally publishedYes


  • Elderly
  • Pneumococcal vaccination status
  • Self-report

ASJC Scopus subject areas

  • General Immunology and Microbiology
  • Infectious Diseases
  • Public Health, Environmental and Occupational Health
  • General Veterinary
  • Molecular Medicine


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