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Free Content Yield of pulmonary tuberculosis cases by employing two screening methods in a community survey [Short Communication]

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OBJECTIVE: To compare the yield of tuberculosis (TB) cases by two screening methods.

SETTING: Two disease surveys conducted in Tiruvallur, south India.

RESULTS: Of bacteriologically confirmed cases, 60% were identified by symptom inquiry alone whereas 82% were identified using chest radiography (CXR).

CONCLUSION: The prevalence of TB was underestimated by both methods. The total cases in this community can be estimated by multiplying the number of identified cases by a correction factor (CF) of 1.7 when symptom inquiry alone is used or 1.2 when CXR is used. The CF may be different in other settings.
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Keywords: chest X-ray; symptoms; yield of cases

Document Type: Short Communication

Affiliations: Tuberculosis Research Centre, Chennai, India

Publication date: 2006-03-01

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  • 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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