Revista Cubana de Salud Pública
Print version ISSN 0864-3466
MARTINEZ BARREIRO, Luis Armando and HERRERA LEON, Lorenzo. Fetal mortality tables by gestational age and the weight of the conception outcome. Rev. cub. salud pública [online]. 2010, vol.36, n.3, pp.204-209. ISSN 0864-3466. http://dx.doi.org/10.1590/S0864-34662010000300003.
Objectives It was intended to devise fetal mortality tables with a new perspective: the use of weight at the moment of expulsing the conception outcome as an explanatory variable instead of the length of gestation. Methods The universe of study was made up of all the twenty two or over week pregnancies expulsed during the 1998-2002 period in Cuba. The information came from the perinatal death and livebirth databases of the National Division of Medical Register and Health Statistics of the Ministry of Public Health of Cuba, and of the National Office of Statistics, respectively. Since temporality demanded by the mortality table is not unique in terms of weight-gestational age correspondence; two basic assumptions were set: continuity of the weight variable that eliminates any doubt, and strictly growing condition, an element that is acceptable if assumed under favourable physiological and clinical conditions during pregnancy. Results The results of this formal application of the technique for the design of the mortality table open up a new perspective to estimate fetal death risks as a function of weight, and generally speaking, as a function of variables for which one may assume that fetal development under normal circumstances follows an upward trajectory. Conclusions It is observes that there are some similarities between fetal survival according to gestational age and the fetal survival according to the weight at the moment of delivering the fetus. This fact may become a new prospect for the development and use of the mortality tables.
Keywords : Mortality table; weight at the moment of delivery; fetal permanence or survival.