The purpose of this cross-sectional quantitative study was to identify iatrogenic nursing events involving elderly patients hospitalized in two nursing wards of a university hospital (Campinas, São Paulo, Brazil). Data was collected among 100 patient records (50 men, 50 women) using an instrument created by the authors. Data analysis was performed using descriptive statistics in addition to Mann-Whitney and Kruskal-Wallis tests. Results were significant at p < 0.05. Latrogenic events in the 26 files included: loss of intravenous site (14), pressure ulcers (8) and falls (2), among others. Reports were not detailed and failed to indicate interventions to prevent new occurrences. The findings suggest the importance of creating ways to encourage nursing professionals to accurately report iatrogenic events, as well as creating wards specifically for the elderly population.43810-7