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In adults with inflammatory bowel disease (IBD), the incidence of cardiovascular events is increased, leading to long-term morbidity. Arterial stiffness (AS) measured by pulse wave velocity (PWV) is a validated early precursor of cardiovascular disease (CVD), and measurement of PWV was shown to be a feasible test in children. The aim of this study was to assess AS in children with IBD. In this prospective study, we determined PWV between the carotid and femoral artery (PWVcf) in 25 children and adolescents with IBD (11 females, median age 14.1 years, median disease duration 2.8 years). The majority (68%) of the subjects were in clinical remission, and 48% received anti-tumor necrosis factor alpha (TNFα) treatment. AS was not increased in this cohort of children and adolescents with IBD, who did not have signs of cardiovascular disease, such as arterial hypertension.Conclusion: PWV seems to be normal in children with IBD in remission or with mild disease activity. Larger studies should assess its potential role as a valid and non-invasive follow-up marker in children with IBD, to avoid cardiovascular complications. What is Known : • Inflammatory bowel disease (IBD) is a risk factor of cardiovascular disease (CVD). • Pulse wave velocity (PWV) measurement is the current gold standard to assess arterial stiffness (AS), which is an early predictor of CVD. What is New: • This is the first study using PWV measurements to determine AS in children with IBD. • In children with IBD in remission or only mild disease activity AS is not increased. [ABSTRACT FROM AUTHOR]