Inclusion Criteria:  Patients with 18 years of age or older, diagnosed with IBD, followed at a gastroenterology consultation at Centro Hospitalar Tondela-Viseu, between November 2016 and April 2017.  Exclusion Criteria:  Individuals with other risk factors for TE (severe hepatic or renal failure, valvular heart disease, atrial fibrillation, heart failure or cardiomyopathy, pregnancy, and oral anticoagulants or heparin at the baseline).