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[A critical analysis of data collected from a retrospective survey in Nabeul (Tunisia) (author's transl)].


 The data presented in this article were gathered during a demographic survey conducted in Tunisia in 1975 among 3500 women. The goal of the survey was to statistically determine the number of women at risk of pregnancy, and the incidence of infant mortality. This article does not aim at presenting results, but submits to a quality control the data gathered on the last 2 births. Variables examined were contraceptive practices, female to male ratio, dates of birth and of death, and age of children at weaning. Many omissions and overregistrations were noted, together with imprecisions regarding dates and ages. Many omissions, such as forgetting the birth or death of a girl, were not due to memory's fault, but to sociologic reasons. Sensible differences were noted between urban and rural areas. The article points out the risks of conducting restrospective studies such as the one described, which seldom yield reliable data.
