Trends, prevalence, and determinants of unfavorable tuberculosis treatment outcomes among adult patients in Northeast Ethiopia: The race to achieve a 90 % treatment success rate by 2025

Abstract

Background

Tuberculosis (TB) continues to be a significant public health issue, especially in developing nations like Ethiopia. The country aims to reach a 90 % treatment success rate for TB by 2025. However, there is a considerable lack of recent data on treatment outcomes in the region. Current data on treatment outcomes and their determinants are crucial for guiding early interventions and aligning efforts with national goals and the End TB Strategy. Understanding the current state of TB treatment outcomes and influencing factors is vital for implementing effective interventions and measuring progress toward the target.

Methods

A four-year retrospective study (2019–2022) was conducted. From 323 patient files, 312 were eligible to be included in the final analysis, resulting in a response rate of 96.6 %. Data collection utilized a structured checklist, and analysis was performed with STATA version 18. The Mann-Kendall trend test was used to detect trends in TB incidence. Multicollinearity was checked using variance inflation factors (VIFs). A logistic regression model identified determinants of treatment outcomes.

Results

The study revealed that 84.94 % of participants achieved favorable treatment outcomes, while 15.06 % had unfavorable outcomes. A decreasing trend in unfavorable outcomes was noted, from 18.84 % in 2019 to 10.71 % in 2022 (Kendall's tau (τ) = −0.0686). Determinants of unfavorable outcomes included older age (AOR: 3.59, 95 % CI: 1.23–10.56), HIV positivity (AOR: 5.43, 95 % CI: 1.65–10.83), and smear-negative pulmonary TB (AOR: 3.82, 95 % CI: 1.39–10.45).

Conclusion

The overall treatment success rate of 84.94 % is below the global target of >90 % for 2025. Tailored treatment strategies for older patients and those co-infected with HIV are recommended. Additionally, improving TB diagnostic capabilities is essential for early intervention and achieving better outcomes.