ABSTRACT
Introduction: Acute rheumatic fever (ARF) and rheumatic heart disease (RHD) are significant causes of morbidity and mortality. Ethiopia has a high RHD prevalence but has no national strategic guidelines for preventing RHD and no data on the status of secondary prevention in children with RHD. Generating local information is essential to designing effective prevention and control strategies. This study describes the status of secondary RHD prevention in Ethiopian children. Methods: A multicenter, cross-sectional study was performed in children aged 5-17 years with an echocardiogram-based RHD diagnosis. Participants with congenital heart disease and a recent RHD diagnosis (<1 year) were excluded. Good adherence was defined as at least 80% completion of intramuscular benzathine penicillin (BPG) or oral Amoxicillin within the previous year. The primary outcome measure was adherence to prophylaxis, expressed as a proportion. Covariates included socio-demographics, type and severity of RHD, and ARF recurrence. Chi-square test and Student's t-test were used to assess differences. Multivariate logistic regression was performed. Results: We included 337 participants with a mean age (±standard deviation) of 12.9±2.6 years. The majority were females (54%) and 73% had severe aortic/mitral disease. BPG (80%) and Amoxicillin (20%) were the prophylaxis of choice. Predictors of good adherence were female sex (P=0.04), use of BPG (0.03), and shorter mean duration of prophylaxis in months (48.5±31.5 vs. 60.7±33, P<0.008). Running out of medicines (35%), interrupted follow-up (27%), and the COVID pandemic (26%) were the three most common reasons for missing prophylaxis. Recurrence of ARF was higher in participants on Amoxicillin (40% vs. 16%, P<0.001) and in those with poor adherence (36.8% vs. 17.9%, P=0.005). Type and duration of prophylaxis (OR 0.5, P=0.02;OR=1.1, P=0.04, respectively), and sex (OR=1.9, P=0.03) were independent predictors of poor adherence. Conclusion: Poor adherence is prevalent in Ethiopian children with RHD. Amoxicillin is a suboptimal option for prophylaxis associated with lower adherence and a higher rate of ARF recurrence.