Time to sputum culture conversion as a predictor of cure in multidrug-resistant tuberculosis patients: a multicenter retrospective cohort study in Pakistan
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View abstract on PubMed
Summary
This summary is machine-generated.Time to sputum culture conversion (SCC) is a strong predictor of cure in multidrug-resistant tuberculosis (MDR-TB) patients. Achieving SCC earlier, particularly by 3-4 months, significantly increases the likelihood of successful treatment outcomes.
Area Of Science
- Infectious Diseases
- Public Health
- Microbiology
Background
- Multidrug-resistant tuberculosis (MDR-TB) poses a significant global health challenge, requiring extended and complex treatment regimens.
- Predicting treatment success in MDR-TB patients is crucial for optimizing patient management and preventing treatment failure.
- Sputum culture conversion (SCC) is a key microbiological marker during tuberculosis treatment.
Purpose Of The Study
- To evaluate the predictive value of time to sputum culture conversion (SCC) for cure in patients with multidrug-resistant tuberculosis (MDR-TB).
- To identify factors associated with delayed SCC and treatment cure among MDR-TB patients on longer treatment regimens (18-24 months).
Main Methods
- A multicenter retrospective cohort study involving 462 patients with confirmed pulmonary MDR-TB.
- Survival analysis using Kaplan-Meier curves and Cox proportional hazards models.
- Binary logistic regression to determine factors associated with time to SCC and cure.
Main Results
- A high rate of SCC (91.8%) and a cure rate of 75.5% were observed.
- The mean time to SCC was 2.4 months.
- Employment, lower sputum smear grading, and resistance to specific drug classes (first-line HREZ, fluoroquinolones) were associated with delayed SCC.
- Earlier SCC (by months 3-6) showed a strong, statistically significant association with cure, with sensitivities and specificities comparable at 3-4 months versus 5-6 months.
Conclusions
- Time to SCC is a significant predictor of cure in MDR-TB patients treated with longer regimens.
- Achieving SCC by 3-4 months demonstrates high predictive value for cure, potentially allowing for earlier assessment of treatment success.
- Factors like employment and drug resistance patterns influence SCC, highlighting the need for personalized treatment strategies.
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