Abstract
Effectively addressing issues related to adolescent children being out of school and vulnerable to harmful practices is essential for advancing SDG 3-5. This study aimed to assess the prevalence, trends, and future projections of adolescent child vulnerability. We analyzed data from 386 datasets spanning 106 countries, encompassing 1,292,258 adolescent girls year 1990- 2023. Bayesian methods were employed to estimate prevalence, trends, and future projections. Sub-Saharan Africa and Latin America & the Caribbean showed a high prevalence of child marriage and early childbirth. Overall, these indicators decreased from 1990 to 2023, but recent years have seen increases in some countries. Projections for 2025 to 2030 suggest that changes in rates will occur in some countries, while most are expected to remain stable. The disparities are in underscore ongoing public health challenges. These issues risk derailing progress towards SDG targets of eliminating harmful practices and ensuring universal access to quality education. Addressing these challenges demands coordinated efforts from countries and the global community to implement effective interventions and strategies.