Effect of Telephone Follow-up on Frequency of Health Maintenance Visits Among Children Attending Free Immunization Clinics:A Randomized, Controlled Trial

atric visits more frequently bytelephoning themafter theybrought their children toour immunizationclinics. We conducted a randomized,controlled studyin whichattending families received either fourfollow-up telephone calls over 13weeksor no telephonecalls. Inthis article, we reporttheeffect ofthefollow-up telephone calls on thefrequency ofwell-child medical visits, andwe alsobriefly discuss theliterature on thecharacteristics ofsuccessfulimmunization programs.