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Sensitivities and specificities of diagnostic tests and infection prevalence of schistosoma haematobium estimated from data on adults in villages northwest of Accra, Ghana

Koukounari, Artemis, Webster, Joanne P, Donnely, Christle A., Bray, Bethany C. , Naples, Jean, Bosompem, Kwabena and Shiff, Clive (2009) Sensitivities and specificities of diagnostic tests and infection prevalence of schistosoma haematobium estimated from data on adults in villages northwest of Accra, Ghana. The American Journal of Tropical Medicine and Hygeine, 80 (3). pp. 435-441. ISSN 0002-9637

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Abstract

Substantial uncertainties surround the sensitivities and specificities of diagnostic techniques for urinary schistosomiasis. We used latent class (LC) modeling to address this problem. In this study, 220 adults in three villages northwest of Accra, Ghana were examined using five Schistosoma haematobium diagnostic measures: microscopic examination of urine for detection of S. haematobium eggs, dipsticks for detection of hematuria, tests for circulating antigens, antibody tests, and ultrasound scans of the urinary system. Testing of the LC model indicated non-invariance of the performance of the diagnostic tests across different age groups, and measurement invariance held for males and females and for the three villages. We therefore recommend the use of LC models for comparison between and the identification of the most accurate schistosomiasis diagnostic tests. Furthermore, microscopy and hematuria dipsticks were indicated through these models as the most appropriate techniques for detection of S. haematobium infection.

Item Type: Article
Official URL: http://www.ajtmh.org/
Additional Information: © 2009 American Society of Tropical Medicine and Hygiene
Library of Congress subject classification: D History General and Old World > DT Africa
R Medicine > RA Public aspects of medicine
Sets: Departments > Statistics
Rights: http://www.lse.ac.uk/library/usingTheLibrary/academicSupport/OA/depositYourResearch.aspx
Date Deposited: 01 Aug 2011 13:19
URL: http://eprints.lse.ac.uk/37716/

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