Osman A. Sankoh, Peter Byass, P. Kim Streatfield, Wasif A. Khan, Abba Bhuiya, Nurul Alam, Ali Sie, Abdramane Soura, Bassirou Bonfoh, Berhe Weldearegawi, Abraham Oduro, Margaret Gyapong, Momodou Jasseh, Siswanto Wilopo, Shashi Kant, Sanjay Juvekar, Thomas N. Williams, Frank O. Odhiambo, Alex Ezeh,
Case weight. Calculated as the ratio of the proportion of the standard population in the relevant age/sex group to the proportion of the total person years of exposure of the relevan age/sex group in the site.