Early results from the Northland immunisation register

Area of Science:

• Public Health
• Health Informatics
• Preventive Medicine

Background:

• A pilot study was conducted in Northland, New Zealand, starting May 1985.
• The study focused on infants born after January 1, 1985.
• The aim was to assess the impact of a centralized, computerized immunization register.

Purpose of the Study:

• To evaluate the effectiveness of a computerized immunization register in improving infant vaccination coverage.
• To test interventions involving GP notifications and parent reminders for immunizations.
• To assess the user acceptance of the new system among healthcare professionals.

Main Methods:

• A controlled trial design was employed, assigning infants to control or test groups.
• The computerized register tracked infant birth information and immunization status.
• Interventions included sending immunization due lists to general practitioners (GPs) and reminder cards to parents for the test group.

Main Results:

• Significant increases in immunization levels were observed in the test group compared to controls.
• Specifically, a 18.2% increase for six-week immunizations, 16.7% for three-month immunizations, and 4.7% for five-month immunizations.
• A user survey indicated high acceptance of the system by GPs and practice nurses.

Conclusions:

• The introduction of a centralized, computerized immunization register effectively improved infant immunization rates.
• The system demonstrated high user acceptability among healthcare providers.
• The pilot's success supports the potential for a national computerized immunization information system.