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Assessing agreement between malaria slide density readings

Neal Alexander12*, David Schellenberg3, Billy Ngasala45, Max Petzold67, Chris Drakeley3 and Colin Sutherland38

Author Affiliations

1 Tropical Epidemiology Group, Department of Epidemiology and Public Health, London School of Hygiene and Tropical Medicine, London, UK

2 Department of Microbiology, Immunology and Tropical Medicine, The George Washington University, Washington, USA

3 Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK

4 Infectious Diseases Unit, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden

5 Department of Parasitology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania

6 Division of International Health, Karolinska Institutet, Stockholm, Sweden

7 The Nordic school of Public Health, Gothenburg, Sweden

8 Health Protection Agency Malaria Reference Laboratory, London School of Hygiene and Tropical Medicine, Keppel Street, London, UK

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Malaria Journal 2010, 9:4  doi:10.1186/1475-2875-9-4

Published: 4 January 2010

Additional files

Additional file 1:

Malaria slide density agreement. A spreadsheet which can be used to implement the method described int the paper. Blue cells, and columns headed in blue, are to be supplied by the user. Yellow cells, and columns headed in yellow, are calculated by the spreadsheet. The data (numbers of parasites actually seen, not per microlitre) should be pasted into columns 'reader 1' and 'reader 2'. It may be convenient to put an identifying variable in the 'ID' column. We suggest omitting double-zero counts from analysis (see main text for rationale). The 'ScratchData' tab is not intended to be modified by the user. However, if more than 1000 paired readings are needed, additional rows can be copied on to the bottom of the 'data' and 'ScratchData' tabs. The last four tabs contain different graphs of the data.

Format: XLS Size: 5MB Download file

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