Survival Status and Predictors of Mortality Among Children Admitted With Acute Lymphocytic Leukemia at Cancer Treatment Hospitals in Addis Ababa, Ethiopia.

Background: Acute lymphocytic leukemia is a cancer affecting the blood and bone marrow and is the most frequently diagnosed cancer among children. In Ethiopia, it represents the predominant form of childhood leukemia, comprising approximately 80% of cases and serving as a leading cause of childhood cancer-related deaths. Therefore, the objective of this study is to examine the survival status and factors that may predict mortality in children admitted with acute lymphocytic leukemia at cancer treatment hospitals in Addis Ababa, Ethiopia.

Methods: A retrospective follow-up study was conducted at cancer treatment hospitals in Addis Ababa, focusing on children diagnosed with acute lymphocytic leukemia. The investigation covered records from January 1, 2017, to December 30, 2023, encompassing a sample of 230 study records. Variables with a P-value below 0.25 in the bivariate analysis were selected for entry into the multivariable analysis. Subsequently, variables demonstrating a P-value less than 0.05 in the multivariable Cox proportional hazards model were deemed statistically significant.

Results: The cumulative proportion of survival was 98.3% (95%CI: 94.8, 99.5), 89.2% (95%CI: 82.0, 93.6), and 24.1% (95%CI: 8.43, 44.1) at the end of the 20^th, 40^th, and 60^th month, respectively. The incidence rate of mortality among cohort of children admitted with acute lymphocytic leukemia was 0.45 per 100 child months. History of relapse (AHR: 2.48; 95%CI: 1.01, 6.08) and infection (AHR: 2.34; 95%CI: 1.03, 5.31) were independent predictors of mortality among children admitted with acute lymphocytic leukemia.

Conclusion: The likelihood of mortality increased in the later stages of follow-up for children admitted with acute lymphocytic leukemia, and the incidence density rate of mortality in this group was lower compared to previous reports from other regions. Furthermore, independent predictors of mortality among children with acute lymphocytic leukemia included a history of relapse and infection.