alexa Risk of Death among HIV Co-Infected Multidrug Resistant Tuberculosis Patients, Compared To Mortality in the General Population of South Africa | OMICS International | Abstract
ISSN 2155-6113

Journal of AIDS & Clinical Research
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Research Article

Risk of Death among HIV Co-Infected Multidrug Resistant Tuberculosis Patients, Compared To Mortality in the General Population of South Africa

Samuel OM Manda1,2, Lieketseng J Masenyetse1, Joey L Lancaster3 and Martie L van der Walt3

1Biostatistics Unit, South African Medical Research Council, Pretoria, South Africa

2Division of Epidemiology and Biostatistics, University of the Witwatersrand, Johannesburg, South Africa

3TB Epidemiology and Intervention Research Unit, South African Medical Research Council, Pretoria, South Africa

*Corresponding Author:
Samuel OM Manda
Biostatistics Unit, South African Medical Research Council
Private Bag X385, Pretoria 0001, South Africa
Tel: +27- 12-339-8518
Fax: +27-339-8523
E-mail: [email protected]

Received Date: May 28, 2013; Accepted Date: June 28, 2013; Published Date: July 02, 2013

Citation: Manda SOM, Masenyetse LJ, Lancaster JL , van der Walt ML (2013) Risk of Death among HIV Co-Infected Multidrug Resistant Tuberculosis Patients, Compared To Mortality in the General Population of South Africa. J AIDS Clinic Res S3:007. doi:10.4172/2155-6113.S3-007

Copyright: © 2013 Manda SOM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Background: Even though highly effective drugs are available in South Africa, multidrug resistant tuberculosis (MDR-TB) patients with HIV infection have higher mortality compared to HIV-uninfected MDR-TB patients. This trend has been observed in similar countries with high HIV prevalence. This study sought to ermine excess mortality attributable to HIV among MDR-TB patients in South Africa using relative survival methods.

Methods: Data available were from a cohort of 2079 MDR-TB patients enrolled in a Standardized Programmatic Management of MDR-TB from 2000 to 2004 in South Africa. A Poisson-based model adjusted for age, gender, year of diagnosis, TB history, and resistance to ethambutol, anti-TB injectable drugs and fluoroquinolones antibiotics was constructed to assess the excess mortality among HIV co-infected MDR-TB patients. Excess hazard ratios (EHRs) were used to describe the effect of the predictors on net mortality, controlling for the general mortality in the South African population.

Results: Death was recorded on 1619 patients, of whom 367 (22.7%) had died within 2 years. Out of the 1413 patients that tested for HIV infection, 554 (39.2%) tested positive. Excess mortality was higher in HIV infected, compared to HIV uninfected, MDR-TB patients (adjusted excess hazard ratio, 5.6 [95% CI, 3.2-9.7]); in patients whose TB isolates’ resistance to ethambutol and kanamycin was unknown (3.7 [2.1-6.2] and 4.87 [1.9-13.3], respectively) vs. known. There were no differences in excess mortality between age and gender of the patient, year of diagnosis and TB history.

Conclusion: Adjusting for some important predictors, MDR-TB patients with HIV infection experienced higher excess mortality compared to HIV-uninfected MDR-TB patients, after accounting for the general mortality in South Africa. An appropriate, though complex method has produced predictor effect estimates similar to those obtained from classical methods. Thus, the use of relative survival methods should be encouraged in the analysis of causespecific mortality, when ascertainment of cause of death is inaccurate or unknown.


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