RESUMEN
Rationale: Multi-drug-resistant tuberculosis (MDR-TB) poses a significant public health challenge to the control and successful eradication of TB globally. Suboptimal treatment outcomes are common among persons with MDR-TB necessitating a need to understand the contextual factors. Objective: We determined the factors associated with unsuccessful TB treatment among persons with MDR-TB at a large TB Unit in Central Uganda. Methods: We retrospectively reviewed medical records for all persons with MDR-TB at Mubende Regional Referral Hospital MDR-TB Clinic in Central Uganda. The patients were treated with either second-line, modified second-line, or individualized anti-TB regimens and completed treatment between January 2012 and October 2023. The primary outcome was unsuccessful TB treatment defined as death, treatment failure, or loss to follow-up and measured as a binary outcome. We used a multivariable binary logistic regression analysis to determine the factors independently associated with unsuccessful TB treatment at a 5 % statistical significance level. We reported the adjusted odds ratio (aOR) and the 95 % confidence interval (CI). Measurements and results: We analyzed data from 98 persons with MDR-TB who were aged 15-78 years (mean 36.4 ± 15.4 years). Of these, 40 (40.8 %) were cured, 25 (25.5 %) completed TB treatment, 1 (1.0 %) had treatment failure, 13 (13.3 %) died, and 19 (19.4 %) were lost to follow-up. Overall, 33 (33.7 %) participants had unsuccessful TB treatment which was associated with older age for a 1-year increase in age (aOR 1.05, 95 % CI 1.01-1.09), malnutrition-mid-upper arm circumference of <12.5 cm (aOR 2.99, 95 % CI 1.16-7.98), and previous TB treatment (aOR 0.28, 95 % CI 0.10-0.77). Conclusion: Unsuccessful TB treatment is high among persons with MDR-TB at this TB Unit. It is more likely as age advances and when persons with MDR-TB have malnutrition, but less likely when they have been previously treated for TB. Therefore, interventions to improve treatment outcomes may be beneficial for persons with MDR-TB who are older, malnourished, and those newly diagnosed with the disease. For example, routine nutritional assessment and counseling, including nutritional support for malnourished persons with MDR-TB may be needed to optimize their TB treatment success.
RESUMEN
Objective: Household contacts (HHCs) of persons with tuberculosis (TB) including rifampicin-resistant or multi-drug-resistant TB (RR/MDR-TB) are at risk for TB infection. We investigated whether index patient-level clinical and socio-demographic factors of persons with MDR-TB are associated with TB disease among their HHCs in Uganda. Methods: We designed an unmatched case-control study. Cases were HHCs of persons with MDR-TB that had TB disease while controls were a random sample of HHCs of persons with MDR-TB that had no TB disease. The case-to-control ratio was 1:3. We identified the factors that significantly differed between the cases and controls in a multivariable binary logistic regression analysis and reported the odds ratio (OR) and 95% confidence interval (CI). Results: We found similar demographic and clinical characteristics among the 11 cases and 33 controls. In a multivariable analysis, malnutrition was significantly associated with being a case than a control (adjusted OR 5.01; 95% CI 1.18-24.83). Conclusion: Therefore, TB Control Programs should focus on identifying malnutrition among persons with MDR-TB and providing nutritional counseling and support to improve recovery, and potentially reduce household TB transmission and optimize treatment success. Additionally, rapid screening for TB and preventive therapy should be prioritized to reduce transmission.