ArticlePloS one2026
Infant mortality rate and time to death determinants in East Africa: A Bayesian spatial frailty analysis of DHS data (2015-2022).
Article in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundInfant mortality refers to the death of an infant before their first birthday. In 2021, approximately 3.8 million infants died worldwide. While interventions have reduced infant mortality rate (IMR) globally, Sub-Saharan Africa (SSA), particularly East Africa, still faces high IMR. Despite many studies, evidence regarding on the impact of spatial effects remain limited. This study aimed to incorporate spatial random effects to identify factors associated with infant mortality.
methodsSecondary data analysis was conducted using a total weighted sample of 101,532 infants from DHS data collected between 2015 and 2022 in East Africa. STATA version 14 was used for data cleaning, and R version 4.3.1 was used for data analysis. A Bayesian spatial frailty analysis model was fitted, and convergence was checked using trace plot. The model goodness of fit was assessed using Cox-snell residual plot.
resultsThe IMR was 39.83 per 1000 live births (95% CI: 35.81-44.27). Breastfeeding initiation time after 24 hours (HR = 4.033, 95% CrI: 3.869-4.207), not having antenatal care (ANC) follow-up (HR = 1.534, 95% CrI: 1.259-1.869), maternal age between 15 and 24 years (HR = 1.256, 95% CrI: 1.11-1.411), low birth weight (HR = 1.575, 95% CrI: 1.388-1.770), plurality (HR = 4.0, 95% CrI: 3.334-4.746), parity more than ten (HR = 2.173, 95% CrI-1.4413.125), parity between five and ten (HR = 1.264, 95% CrI: 1.075-1.472), being a male child (HR = 1.276, 95% CrI: 1.149-1.411), and maternal employment status (HR = 0.740, 95% CrI: 0.606-0.909) were factors associated with infant mortality. High frailty was detected in northern and southwestern Malawi and in the western regions of Mozambique, Zambia, and Burundi.
conclusionThe pooled IMR was higher than the global estimate of IMR. Infant mortality was associated with maternal, infant, and reproductive factors. In addition, high spatial frailty was observed in some areas, suggesting the presence of unmeasured regional factors related to geographic location. These findings call attention to the need for policies that focus on strengthening antenatal care coverage, promoting early initiation of breastfeeding, improving maternal socioeconomic empowerment, and prioritizing high-frailty areas through resource allocation to reduce infant mortality.
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