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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
The tuberculin skin test: A comparison of ruler and calliper readings
International Journal of Tuberculosis and Lung Disease, Volume 14, No. 10, Year 2010
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Description
BACKGROUND: The Mantoux tuberculin skin test (TST) is widely used to diagnose latent infection with Mycobacterium tuberculosis. TST skin induration may be measured either by a transparent ruler or by a pair of callipers. We hypothesised that the type of instrument used may affect the reading. OBJECTIVE: To determine whether variability in Mantoux TST measurement is affected by the type of reading instrument. METHOD: A TST (Mantoux method) was performed among healthy adolescents. The indurations were read with among ruler and calliper by two independent readers. Limits of agreement and Kappa (κ) scores at TST positivity cut-off points were calculated. A Bland-Altman graph was constructed. RESULTS: The 95% limits of agreement between instruments ranged from -5 mm to 3 mm. The limits of agreement between readers ranged from -5 mm to 4 mm. κ scores between instruments were respectively 0.7 and 0.8 at 15 mm and 10 mm cut-offs. CONCLUSION: The variability between readers of TST indurations is not influenced by changing the reading instrument. © 2010 The Union.
Authors & Co-Authors
Geldenhuys, Hennie D.
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Verver, Suzanne
Netherlands, The Hague
Kncv Tuberculosis Foundation
Netherlands, Amsterdam
Universiteit Van Amsterdam
Surtie, Shireen
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Hatherill, Mark
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
van Leth, Frank C.M.
Netherlands, The Hague
Kncv Tuberculosis Foundation
Netherlands, Amsterdam
Universiteit Van Amsterdam
Kafaar, Fazlin
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Tameris, Michele D.
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Kleynhans, W.
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Luabeya, Angelique Kany Kany
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Moyo, Sizulu
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Sikhondze, Welile
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Hanekom, Willem Albert
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Mahomed, Hassan
South Africa, Observatory
South African Tuberculosis Vaccine Initiative
South Africa, Cape Town
University of Cape Town
Statistics
Citations: 13
Authors: 13
Affiliations: 4
Identifiers
ISSN:
10273719