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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
The relationship between the haemoglobin concentration and the haematocrit in Plasmodium falciparum malaria
Malaria Journal, Volume 7, Article 149, Year 2008
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Description
Background. Malaria is a very important cause of anaemia in tropical countries. Anaemia is assessed either by measurement of the haematocrit or the haemoglobin concentration. For comparisons across studies, it is often necessary to derive one measure from the other. Methods. Data on patients with slide-confirmed uncomplicated falciparum malaria were pooled from 85 antimalarial drug trials conducted in 25 different countries, to assess the haemoglobin/haematocrit relationship at different time points in malaria. Using a linear random effects model, a conversion equation for haematocrit was derived based on 3,254 measurements from various time points (ranging from day 0 to day 63) from 1,810 patients with simultaneous measurements of both parameters. Haemoglobin was also estimated from haematocrit with the commonly used threefold conversion. Results. A good fit was obtained using Haematocrit = 5.62 + 2.60 * Haemoglobin. On average, haematocrit/3 levels were slightly higher than haemoglobin measurements with a mean difference (± SD) of -0.69 (± 1.3) for children under the age of 5 (n = 1,440 measurements from 449 patients). Conclusion. Based on this large data set, an accurate and robust conversion factor both in acute malaria and in convalescence was obtained. The commonly used threefold conversion is also valid. © 2008 Lee et al; licensee BioMed Central Ltd.
Authors & Co-Authors
Lee, Sue J.
Unknown Affiliation
Stepniewska, K. A.
Unknown Affiliation
Anstey, Nicholas M.
Unknown Affiliation
Ashley, Elizabeth A.
Unknown Affiliation
Barnes, Karen Irma
Unknown Affiliation
Binh, Tran Quang
Unknown Affiliation
D'Alessandro, Umberto
Unknown Affiliation
Day, Nichloas P.J.
Unknown Affiliation
de Vries, Peter J.
Unknown Affiliation
Dorsey, Grant M.
Unknown Affiliation
Guthmann, Jean Paul
Unknown Affiliation
Mayxay, Mayfong
Unknown Affiliation
Newton, Paul N.
Unknown Affiliation
Nosten, François Henry
Unknown Affiliation
Olliaro, Piero L.
Unknown Affiliation
Osario, Lyda
Unknown Affiliation
Pinoges, Loretxu L.P.
Unknown Affiliation
Price, Ric N.
Unknown Affiliation
Rowland, Mark W.
Unknown Affiliation
Smithuis, Frank M.
Unknown Affiliation
Taylor, Robert
Unknown Affiliation
White, Nicholas J.
Unknown Affiliation
Statistics
Citations: 107
Authors: 22
Affiliations: 19
Identifiers
Doi:
10.1186/1475-2875-7-149
e-ISSN:
14752875
Research Areas
Infectious Diseases
Maternal And Child Health