• Rasheedat Ibraheem, Moshood Akintola, Mohammed Abdulkadir, Hafsat Ameen, Oladimeji Bolarinwa, and Muhammed Adeboye.
• University of Ilorin, Department of Paediatrics and Child Health; University of Ilorin Teaching Hospital, Paediatrics and Child Health.
• Afr Health Sci. 2021 Jun 1; 21 (2): 951-959.

BackgroundReminders via mobile devices deployed as short message services (SMS) or calls have been identified to be a useful strategy in improving routine immunization uptake in several countries.ObjectiveTo identify the timeliness of appointments with reminders (calls or SMS), SMS health education and the routine care, and the vaccination completion rates in Ilorin, Nigeria.MethodMother-infant pairs presenting for the first vaccination appointment were randomized into four (three interventions, one control) groups, each consisting of 140 participants. Intervention groups were reminders via calls (A), SMS reminders (B), immunization fact SMS messages (C) and controls on usual care (D). Reminders were made a day before the appointment while SMS immunization facts were sent at five weeks, nine weeks and eight months. Appropriate timing was defined as the scheduled visit ±3 days.ResultsThe immunization completion rates after the nine months' visit were 99.2%, 99.3%, 97% and 90.4% for Groups A, B, C and D respectively. Compared with controls, Group A had the highest odds [AOR 8.78 (6.10, 12.63)] of presenting at an appropriate time, followed by Group B [AOR 2.56 (1.96, 3.35)], then Group C [AOR 2.44 (1.87, 3.18)].ConclusionReminders/SMS immunization facts improve vaccination completion rates.© 2021 Ibaheem R et al.

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