Background: We evaluated the effect of parenteral nutrition (PN) and enteral nutrition (EN) on in-pediatric intensive care unit (PICU) mortality before and after a continuous education program in nutrition support that leads to implementation of a nutrition support team (NST). Methods: We used a historical cohort study of infants hospitalized for > 72 hours at the PICU from 1992 to 2003. Five periods were selected (P1 to P5), considering the modifications incorporated into the program: P1, without intervention; P2, basic themes and original articles discussion; P3, clinical and nursing staff participation; P4, clinical visits; P5, NST. The samples were compared in terms of sex, age, admitting service (ie, medical vs surgical), prognostic index of mortality, length of stay (LOS), duration of mechanical ventilation, in-PICU mortality rate, and percentage of time receiving EN and PN for each patient. Bi- and multivariate analyses were performed. Statistical significance was set at 0.05 level. Results: Progressive increase was observed in EN use (P =.0001), median values for which were 25% in P1 and rose to 67% by P5 in medical patients; there was no significant difference in surgical patients. A reduction was observed in PN use; in P1 medians were 73% and 69% for medical and surgical patients respectively, and decreased to 0% in P5 for both groups (p =.0001). There was significant reduction in-PICU mortality rate during P4 and P5 among medical patients (p <.001). The risk of death was 83% lower in patients that received EN for > 50% of LOS (odds ratio, 0.17; confidence interval, 0.066-0.412; p =.000). Conclusions: The program motivated an increase in EN and a decrease in PN use, mainly after implementation of NST and reduced in-PICU mortality rate.