Objective: To evaluate the relationship between presence/absence of Pressure Ulcer, socio-demographic factors and hospitalization. Method: Case-control study, performed through multiple logistic regression based on information from the adverse event reporting system and the hospital information system, between September/2014 and August/2015. Results: Among the risk factors, after adjustment, age greater than or equal to 60 years, hospitalization due to infectious, parasitic and neoplastic diseases, periods of hospitalization longer than seven days and being hospitalized in ICU other than ICU covenant were highlighted. Most of ulcers were reported with mild damage degree and Stage II classification. Conclusion: Age and days of hospitalization presented a dose-response effect, the longer the age or the number of days of hospitalization, the greater the chances of Pressure Ulcer. There was a significant association among higher occurrences of death in patients with ulcer.