Derbachew AsfawSintayehu Birhanu2025-08-182025-08-182024-06https://etd.aau.edu.et/handle/123456789/6969The term "birth interval" denotes the duration between the birth of one child and the subsequent birth. This study aimed to discern the factors influencing the second birth interval among women in Ethiopia, utilizing a parametric shared frailty model. Data was sourced from the 2019 Ethiopian Mini Demographic and Health Survey, comprising 5846 women aged 15-49 years. Both accelerated failure time and gamma shared frailty models were employed in this study, with the performance of fitted models compared using AIC. The findings revealed that 4,678 (80.02%) women experienced a second birth. The log-logistic gamma shared frailty model demonstrated the lowest AIC value and was consequently selected for final analysis. The analysis from the fitted log-logistic gamma shared frailty model highlighted the significance of clustering effects. Moreover, factors such as women’s age, marital status, level of education, place of residence, age at first birth, contraceptive usage, and child survival status emerged as the most influential determinants of the second birth interval. Conversely, variables like wealth index and breastfeeding status were found to be insignificant covariates. Specifically, an increase in women’s age correlated with a decrease in the time to the second birth, while factors such as marital status, level of education, rural residency, being aged 20-24 years at first birth, and contraceptive usage were associated with longer intervals between births. Government health policies and interventions aimed at enhancing maternal and child health programs should prioritize women’s education, and efforts should be made to encourage and facilitate the use of contraceptive methods for family planning and birth spacing purposes.en-USDeterminants of TimeSecond Birth Among WomenReproductive Age in EthiopiaApplication of Parametric Shared Frailty ModelThesis