Objectives: The aim of this study was to determine whether adequate caloric intake and earlier enteral feeding have an impact on treatment outcome and number of complications, and whether risk factors, percentage of burnt area, and number of complications affect outcome and length of ICU hospitalization. Subjects and methods: The study was conducted retrospectively at the ICU of University Hospital of Split from January 1st 2015 to December 31st 2020 by reviewing the documentation. Out of 65 treated burnt patients, 37 severely burnt patients were included in the study according to the inclusion criteria. Anamnestic data and all necessary parameters and treatment outcomes were collected for each patient. Daily energy needs were calculated according to Schofield's formula. Results: In our study, we found that although the total caloric intake for the entire observed period had no effect on the outcome, the share of caloric intake was statistically significantly higher than recommended in the dead in the period from day 5 to day 10 (P = 0.014). Considering the proportions of enteral nutrition, we find a positive correlation for the outcome at intake from days 3 to 5, ie, by increasing the early enteral diet (days 4 to 5) by 20%, the chance of survival increases by 4.4 times. In morbidity and mortality, we find a correlation between age and the number of risk factors with outcome, ie increasing age by 10 years increases the risk of mortality by 6.2 times, and 2 risk factors increase the risk of death by 14 times. The length of hospitalization was increased by a higher number of complications and a higher percentage of burnt area. Conclusions: Adequate caloric intake does not contribute to a better outcome, but higher caloric intake can lead to poorer outcomes. Early enteral nutrition leads to better outcomes, and subjects with fewer risk factors achieve earlier enteral nutrition. Subjects with a higher percentage of burnt area and more complications have a longer length of hospitalization at the ICU, and a higher number of risk factors are associated with a poorer treatment outcome.