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Related Experiment Videos

Choosing immunisation coverage indicators at the local level.

Paolo Giorgi Rossi1, Annunziata Faustini, Teresa Spadea

  • 1Department of Epidemiology, ASL Roma E, Rome, Italy. malinf3@asplazio.it

European Journal of Epidemiology
|December 4, 2004
PubMed
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Parental recall is a reliable source for childhood immunisation coverage, especially in retrospective studies. Age-appropriate indicators provide a more accurate assessment of population susceptibility to vaccine-preventable diseases.

Area of Science:

  • Public Health
  • Epidemiology
  • Vaccinology

Background:

  • Assessing the reliability of information sources for immunisation coverage surveys remains a challenge.
  • The precision of various coverage indicators needs further investigation.

Purpose of the Study:

  • To evaluate the reliability of parental recall versus vaccination card data for assessing childhood immunisation coverage.
  • To compare the effectiveness of up-to-date (UTD) and age-appropriate indicators in identifying local vaccination gaps.

Main Methods:

  • A survey of 323 children from two birth cohorts in the Lazio region, Italy.
  • Data collected via mail-in questionnaires using vaccination cards or parental recall.
  • Calculated coverage indicators for polio, diphtheria-tetanus, pertussis, hepatitis B, and measles at 24 months, comparing UTD and age-appropriate metrics.

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Main Results:

  • Parental recall showed higher coverage rates than certification for diphtheria-tetanus, pertussis, and measles in the older cohort.
  • The age-appropriate indicator identified more districts with significant vaccination delays compared to the UTD indicator.
  • Younger cohort demonstrated higher immunisation coverage than the older cohort for several vaccines.

Conclusions:

  • Parental recall is a sensitive and reasonably reliable data source for retrospective immunisation studies when vaccination cards are unavailable.
  • Age-appropriate indicators offer a more comprehensive and precise evaluation of population susceptibility at the local level.
  • Findings highlight the importance of choosing appropriate indicators for effective public health surveillance.