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Open Access Effectiveness of community-based DOTS strategy on tuberculosis treatment success rates in Namibia

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SETTING: DOTS is a key pillar of the global strategy to end tuberculosis (TB).

OBJECTIVE: To assess the effectiveness of community-based compared with facility-based DOTS on TB treatment success rates in Namibia.

METHODS: Annual TB treatment success, cure, completion and case notification rates were compared between 1996 and 2015 using interrupted time series analysis. The intervention was the upgrading by the Namibian government of the TB treatment strategy from facility-based to community-based DOTS in 2005.

RESULTS: The mean annual treatment success rate during the pre-intervention period was 58.9% (range 46–66) and increased significantly to 81.3% (range 69–87) during the post-intervention period. Before the intervention, there was a non-significant increase (0.3%/year) in the annual treatment success rate. After the intervention, the annual treatment success rate increased abruptly by 12.9% (P < 0.001) and continued to increase by 1.1%/year thereafter. The treatment success rate seemed to have stagnated at ∼85% at the end of the observation period.

CONCLUSION: Expanding facility-based DOTS to community-based DOTS increased annual treatment success rates significantly. However, the treatment success rate at the end of the observation period had stagnated below the targeted 95% success rate.
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Keywords: TB treatment outcome; policy analysis; population-based

Document Type: Research Article

Affiliations: 1: School of Pharmacy, Faculty of Health Sciences, Ministry of Health and Social Services (MOHSS), University of Namibia, Windhoek 2: National Tuberculosis and Leprosy Programme, Ministry of Health and Social Services, Windhoek, Namibia 3: Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada 4: Tuberculosis Clinic, Katutura Intermediate Hospital, MOHSS, Windhoek, Namibia 5: Anoixis Corporation, Natick, Massachusetts, USA 6: Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden

Publication date: April 1, 2019

More about this publication?
  • The International Journal of Tuberculosis and Lung Disease publishes articles on all aspects of lung health, including public health-related issues such as training programmes, cost-benefit analysis, legislation, epidemiology, intervention studies and health systems research. The IJTLD is dedicated to the continuing education of physicians and health personnel and the dissemination of information on tuberculosis and lung health world-wide.

    Certain IJTLD articles are selected for translation into French, Spanish, Chinese or Russian. They are available on the Union website

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