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Rapid Diagnostic Algorithms as a Screening Tool for Tuberculosis: An Assessor Blinded Cross-Sectional Study

Author

Listed:
  • Franz Ratzinger
  • Harald Bruckschwaiger
  • Martin Wischenbart
  • Bernhard Parschalk
  • Delmiro Fernandez-Reyes
  • Heimo Lagler
  • Alexandra Indra
  • Wolfgang Graninger
  • Stefan Winkler
  • Sanjeev Krishna
  • Michael Ramharter

Abstract

Background: A major obstacle to effectively treat and control tuberculosis is the absence of an accurate, rapid, and low-cost diagnostic tool. A new approach for the screening of patients for tuberculosis is the use of rapid diagnostic classification algorithms. Methods: We tested a previously published diagnostic algorithm based on four biomarkers as a screening tool for tuberculosis in a Central European patient population using an assessor-blinded cross-sectional study design. In addition, we developed an improved diagnostic classification algorithm based on a study population at a tertiary hospital in Vienna, Austria, by supervised computational statistics. Results: The diagnostic accuracy of the previously published diagnostic algorithm for our patient population consisting of 206 patients was 54% (CI: 47%–61%). An improved model was constructed using inflammation parameters and clinical information. A diagnostic accuracy of 86% (CI: 80%–90%) was demonstrated by 10-fold cross validation. An alternative model relying solely on clinical parameters exhibited a diagnostic accuracy of 85% (CI: 79%–89%). Conclusion: Here we show that a rapid diagnostic algorithm based on clinical parameters is only slightly improved by inclusion of inflammation markers in our cohort. Our results also emphasize the need for validation of new diagnostic algorithms in different settings and patient populations.

Suggested Citation

  • Franz Ratzinger & Harald Bruckschwaiger & Martin Wischenbart & Bernhard Parschalk & Delmiro Fernandez-Reyes & Heimo Lagler & Alexandra Indra & Wolfgang Graninger & Stefan Winkler & Sanjeev Krishna & M, 2012. "Rapid Diagnostic Algorithms as a Screening Tool for Tuberculosis: An Assessor Blinded Cross-Sectional Study," PLOS ONE, Public Library of Science, vol. 7(11), pages 1-6, November.
    • Handle: RePEc:plo:pone00:0049658
    DOI: 10.1371/journal.pone.0049658
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