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In: Infant and childhood mortality and socio-economic factors in Africa. (Analysis of national World Fertility Survey data) / Mortalite infantile et juvenile et facteurs socio-economiques en Afrique. (Analyse des donnees nationales de l'Enquete Mondiale sur la Fecondite), [compiled by] United Nations. Economic Commission for Africa [ECA]. Addis Ababa, Ethiopia, United Nations, ECA, 1987. 7-26. (RAF/84/P07)Technical problems and methods associated with the analysis of differential child mortality data for a conference of representatives from 8 African countries, sponsored by the UN Economic Commission for Africa and the International Statistical Institute are described. The data being interpreted were from the World Fertility Surveys, conducted between 1977 and 1981, including complete birth histories of women up to 50 years of age. A core questionnaire contained 7 sections on woman's background, maternity history, contraceptive knowledge and marriage history, fertility regulation, work history and husband's background. Mortality was measured by Brass methods and the cohort approach with analysis of determining factors. No adjustment was made for omission of births and of dead children: since underreporting is more likely to occur in the past, current mortality estimates can be considered fairly accurate. Methods of correcting for misreporting are described. The extent of potential bias due to lack of data on children whose mothers were deceased at the time of survey is unknown. Another source of bias is truncation due to loss of data on older children born to older women. Generally the quality of the World Fertility Survey mortality data is reasonably good, compared to other studies.