Early connections: effectiveness of a pre-call intervention to improve immunisation coverage and timeliness

Felicity Goodyear-Smith1, Cameron Grant, Tracey Poole

  • 1Department of General Practice and Primary Health Care, The University of Auckland, PB 92019, Auckland, New Zealand. f.goodyear-smith@auckland.ac.nz

Insights

A general practice pre-call intervention improved infant immunisation timeliness, but the effect was not clinically significant. Early engagement and tracking systems are key to further boosting vaccination coverage rates.

Area of Science:

  • Pediatrics
  • Public Health
  • Preventive Medicine

Background:

  • Delayed childhood immunisations increase the risk of vaccine-preventable diseases.
  • Timely first vaccine doses predict subsequent complete immunisation schedules.
  • Early engagement with parents and healthcare providers can reduce delayed vaccinations.

Purpose of the Study:

  • To evaluate a general practice-based pre-call intervention aimed at enhancing childhood immunisation timeliness.
  • Assessing the effectiveness of proactive outreach in improving on-time vaccination uptake.

Main Methods:

  • A clustered controlled trial involving general practices in an urban district.
  • Practices were randomized to implement a pre-call intervention for infants at four weeks or provide usual care.
  • Data collected on immunisation timeliness for the primary series.

Main Results:

  • Infant immunisation timeliness for the primary series reached 98% at the six-week event in nominated practices.
  • The pre-call intervention showed statistical significance but lacked clinical significance.
  • Lower coverage rates were observed in infants without a nominated general practice, impacting overall district rates.

Conclusions:

  • Pre-call letters and telephone follow-up are easily implementable interventions within practice management systems.
  • Effective systems for early infant identification, primary care engagement, and tracking of unenrolled infants are crucial.
  • These strategies hold the greatest potential for further improving immunisation coverage rates.
Abstract

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