Abstract Objectives: to analyze the difference among geographical units and the evolution of infant mortality rate (IMR) based on Ecuadorian censuses (1990-2001-2010).Methods: artificial Neural Network analyzed the impact of sociodemographic factors over the variability of IMR.Poisson regression analyzed the Baby Bottle variation of the standardized IMR (sIMR).Results: the decrease in the national IMR was 63.8%; however, 42.
8% provinces showed an increase in 2001-2010.The variability was explained mainly CHESTNUT CREAM by illiteracy decrease.The adjusted RR between provincial sIMR with illiteracy and poverty revealed a trend towards the unit.Conclusions: the variation of IMR reflects a complex interaction of the sociodemographic factors.