Impact of Drug Resistance on Tuberculosis Recurrence and Mortality
Author Information
Author(s): Cox Helen, Kebede Yared, Allamuratova Sholpan, Ismailov Gabit, Davletmuratova Zamira, Byrnes Graham, Stone Christine, Niemann Stefan, Rüsch-Gerdes Sabine, Blok Lucie, Doshetov Daribay
Primary Institution: The University of Melbourne
Hypothesis
How does drug resistance affect tuberculosis recurrence and mortality after successful treatment?
Conclusion
The study found high rates of tuberculosis recurrence and mortality among patients treated under the DOTS program, particularly in those with drug-resistant strains.
Supporting Evidence
- 15% of patients died per year after diagnosis.
- 36% of successfully treated patients were rediagnosed with active TB.
- MDR TB infection significantly predicted mortality and recurrence.
Takeaway
Even if patients seem cured of tuberculosis, many get sick again, especially if their infection was caused by drug-resistant bacteria.
Methodology
A retrospective observational study was conducted on 213 sputum smear-positive TB patients treated in a DOTS program in Uzbekistan.
Potential Biases
Potential underestimation of recurrence rates due to access issues for rediagnosis in rural areas.
Limitations
The study relied on historical data and lacked adequate information on treatment adherence.
Participant Demographics
64% male, mean age 35 years, 40% lived in rural districts, 50% had previous TB treatment.
Statistical Information
P-Value
p<0.0001
Confidence Interval
95% CI, 11% to 19%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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