A randomized trial of the effectiveness of computer-generated telephone messages in increasing immunization visits among preschool children.

Author: Linkins- R W; Dini- E F; Watson- G & Patriarca- P A
Tags: ICT


OBJECTIVE: To assess the effectiveness of computer-generated telephone reminder and recall messages in increasing preschool immunization visits. DESIGN: Randomized- controlled trial. SETTING: Fourteen counties in urban and rural Georgia. STUDY PARTICIPANTS: Children (N = 8002) who were younger than 2 years/ had telephone numbers listed in preexisting computerized immunization databases/ and were due or late for immunization(s) during the 4-month enrollment period. INTERVENTION: Households of children were randomized to receive or not receive a general or vaccine-specific computer-generated telephone reminder or recall message the day before the child was due- or immediately after randomization if the child was late. MAIN OUTCOME MEASURE: The rates of immunization visits during the 30-day follow-up period. RESULTS: Of the 4636 children whose households were randomized to receive a message- 1684 (36.3%) visited the health department within 30 days compared with 955 (28.4%) of the 3366 children whose households were not contacted (risk ratio RR = 1.28/ 95% confidence interval CI = 1.20 to 1.37/ P < .01). Immunization visits were more frequent (41.1%) among the 3257 children whose households actually received the message (RR = 1.45/ 95% CI = 1.36 to 1.56/ P < .01). Improvement in immunization visits was similar for general and specific messages- greater for recall than reminder messages- and greatest for children who were late for the third dose of the diphtheria-tetanus-pertussis vaccine and the measles-mumps-rubella vaccine. CONCLUSION: These data suggest a simple and effective way to increase preschool immunization visits- particularly for vaccines associated with the lowest immunization rates.


Type Journal article
Country Not Specified
PubMed URL http://www.ncbi.nlm.nih.gov/pubmed/8075732
Journal Archives of pediatrics \& adolescent medicine
Volume 148
Year 1994
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