Introduction: Acute and chronic wounds provoke physical, psychological, social and economic changes for individuals and their families. While, in an international context, epidemiological data regarding these wounds and lesions is well established, it is still in an incipient stage in Brazil, particularly in the Amazon Basin Region. Objective: To identify and analyze the prevalence and demographic and clinical factors associated with the occurence of several acute and chronic wounds (frictional lesions-frictional keratosis, incontinence-associated dermatitis-IAD, post-operative wound complications, pressure sores and diabetic ulcers) in hospitalized patients. Methods: This is an observational, transverse, analytical and descriptive epidemiological study conducted in seven hospitals in the city of Manaus. The data was collected by consulting hospital records, interviews with patients or legal guardians and physical examinations of all hospitalized patients, during the period from March through June 2015. The lesions found were evaluated using the following instruments: Classification System STAR-Frictional Lesion for frictional lesions; Incontinence Associated Dermititis Intervention Tool (IAD-IT) for IAD; Pressure Ulcer Scale for Healing-PUSH UP for pressure sores and Wagner Classification for diabetic ulcers. Moreover, an instrument for socio-demographic and clinical data collection and the Braden Scale were also employed. The data was analyzed by way of the Chi-squared distribution test or T-Test for numerical ones. The decisionmaking tree model using the Classification and Regression Tree (CART) algorithm was utilized in the identification of factors associated with the presence of lesions, simultaneously and in isolation. Results: The study sample (n=775) was predominantly of the male sex (457 / 58,9%) with an average age of 60.4 years (DP=18.7) mulatto (240/30.9%); marital situation with spouse (413/53.2 %) and elementary school complete (403/52.0%). One hundred and seventy-eight patients presented lesions during the datacollection period, leading to an overall point prevalence of 23%. With an average of 1.1 lesions (DP=0.4) per patient, pressure sores predominated (n=80/10.3%), followed by diabetic ulcers (n=66/8.5%). The remaining types of lesions showed a prevalence of 2.7% (n=21) for post-operative wound complications; 0.9% (n=7) for frictional lesions and 0.5% (n=4) for incontinence associated dermititis (IAD). The primary occurence of lesions to particular parts of the body were frictional lesions to the back of the left hand; incontinence associated dermititis lesions to the region of the outer labia; post-operative wound complications to the left leg; pressure sores to the sacrum; and diabetic ulcers to the sole of the left foot. CART showed Diabetes Mellitus, the use of anticoagulants, the presence of rigidness, the Braden score without risk (>18), the presence of bandages and bruises as factors simultaneously associated with the presence of lesions, repeating some of these conditions for pressure s...