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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.
Introduction:
Children who have missed or delayed immunisations are at greater risk of vaccine-preventable diseases and getting their first scheduled dose on time strongly predicts subsequent complete immunisation. Developing a relationship with an infant's parents and general practice staff soon after birth followed by a systematic approach can reduce the number of delayed first immunisations.
Aim:
To assess the effectiveness of a general practice-based pre-call intervention to improve immunisation timeliness.
Methods:
Clustered controlled trial of general practices in a large urban district randomised to either delivery of pre-call intervention to all babies at aged four weeks or usual care.
Results:
Immunisation timeliness for infants receiving the primary series of immunisations among their nominated Auckland general practices was higher than expected at 98% for the six week event. The intervention was statistically but not clinically significant. Coverage was significantly lower among infants with no nominated practice which reduced overall coverage rate for the district.
Discussion:
Pre-call letters with telephone follow-up are simple interventions to introduce into the practice management system and can be easily implemented as usual standard of care. Early identification of newborn infants, primary care engagement and effective systems including tracking of infants not enrolled in general practices has the greatest potential to improve immunisation coverage rates even further.
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