Effectiveness of Individually Tailored Calendars in Promoting Childhood Immunization in Urban Public Health Centers

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Abstract
Objectives. We examined the effectiveness of tailored calendars in increasing childhood immunization rates. Methods. Parents of babies aged birth to 1 year (n = 321) received individually tailored calendars promoting immunization from 2 urban public health centers. For each baby, an age- and sex-matched control was selected from the same center. Immunization status was tracked through age 24 months. Results. A higher proportion of intervention than of control babies were up to date at the end of a 9-month enrollment period (82% vs 65%, P < .001) and at age 24 months (66% vs 47%, P < .001). The younger the baby’s age at enrollment in the program, the greater was the intervention effect. Conclusions. Tailored immunization calendars can help increase child immunization rates.