Background:~Children with juvenile idiopathic arthritis (JIA) commonly visit their pediatric rheumatologist every 3 months. This costs time and money for the patient, their parents or guardian, the hospital and other stakeholders. Therefore, the THUIS study aims to demonstrate that JIA patients in clinical remission can safely increase their visit interval by home-monitoring disease activity using the EuroQol five-dimensional youth questionnaire with five levels (EQ-5D-Y-5L) and Juvenile Arthritis Multidimensional Assessment Report (JAMAR).~Methods:~JIA patients in remission from the Wilhelmina Children's Hospital in Utrecht, the Netherlands, will skip one 3-monthly control visit and instead complete an online EQ-5D-Y-5L and JAMAR questionnaire at home. The home-monitoring results will be evaluated by a research nurse in consultation with the treating pediatric rheumatologist in order to determine if the patient can safely remain at home or has to be planned in for a short-term control visit at the hospital. Primary and secondary outcomes after 6 months will be compared with a historical cohort of matched JIA patients in order to prove non-inferiority.
In the THUIS study, JIA patients in clinical remission will skip one 3-monthly hospital control visit and instead monitor their disease activity at home. Outcomes at 6 months will be compared to those from a historical cohort.