Kidney disease is comprised of changes in kidney function that is maintained for a varying period, defined in two ways: acute kidney failure (AKF) and chronic kidney disease (CKD), both depending on the development of the disease. The objective of this study is to identify whether there is a difference in the nutritional status between AKF and CKD between the genders and age groups of hospitalized patients and the prevalence of other diseases associated with kidney disease. Methods: Prospective

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... observational study. We selected 33 patients admitted to a hospital in Guarapuava, Paraná. The collected information was anthropometric assessment, 24-hour food recall, clinical and nutritional diagnosis. The results were evaluated by descriptive and inferential analysis. Results: The mean age was 61.0 ± 17.4 years, with the majority being female (54.5%; n = 18) and elderly (66.6%; n = 21), regarding the classification of nutritional status, most were eutrophic (57.6%) and 42.4% and 51.5% were malnourished by the circumference of the arm and the tricipital skin fold, respectively. As for the personal history investigated, no statistically significant differences were found, with a statistical tendency for patients with a clinical diagnosis of CKD to have arterial hypertension. Conclusion: Even though the majority of the studied population had an adequate nutritional status, there was also a tendency towards malnutrition due to other parameters of anthropometric assessment.