Further analysis of determinants of Pentavalent and Measles immunizations dropouts among children under five years of age in Ethiopia from Mini-EDHS 2019

Background: Globally, immunization prevents an estimated 2-3 million deaths from illnesses that can be prevented by vaccination. The predictors of Pentavalent and Measles immunization dropout were not investigated sufficiently. Therefore, this analysis was meant to determine the coverage, burden, and predictors of Pentavalent and Measles immunizations in Ethiopia.

Materials and methods: This study was a further analysis of the Mini Ethiopian Demographic Health Survey (EDHS) 2019, conducted with a nationally representative sample. In this study, immunization data was collected from a total sample of 3208 children of which 2004 (34.8%) children who received pentavalent 1 were considered for this study. Univariable, bi-variable, and multilevel mixed effect analysis was done using STATA version 17 Software. The mixed-effect model with the lowest AIC and BIC (information criteria) was chosen. A factor was designated as a significant predictor of immunization dropout if its p-value was less than 0.05 at 95% CI. The best-fitting model among the fitted models was ultimately chosen using the Akaike and Bayesian Information Criteria (AIC and BIC).

Result: The mean age of the head of the household was 37.6. The majority (68.9%) of the residents were from rural areas and of the total population, 64.9% have no formal education. Being residents of Afar increased the odds of dropping out by 3.28 (AOR = 3.28; 95% CI: 1.12, 9.56), whereas being residents of Addis Ababa reduced their odds of dropping out from prentavalent 3 by 68.1% (AOR = 0.319; 95% CI: 0.122, 0.833) compared to their Tigray counterparts. The dropout rate of Pentavalent 1 to measles 1 vaccination was 4.33 times higher among residents of Afar (AOR = 4.33; 95% CI: 1.38, 13.56). As the level of wealth increases, the quintile increases from poorer to richer compared to those in the poorest wealth quantile category, and marital status also affects the immunization dropout rate of their children.

Conclusions: Immunization coverage of Ethiopian children was low and the dropout from pentavalent 1 and measles vaccination was high compared to the national and international targets to improve immunization coverage and reduce dropout. So different cost-effective interventions like Education provision for the community, decision-making facilitation, behavioral change support, and multi-system participation were required to increase vaccination coverage and reduce the vaccine dropout among children in Ethiopia.