OBJECTIVES: Decreased quality of life (QoL) is a significant complication of most rheumatic conditions in adults, whereas data on health-related quality of life (HRQoL) in children with juvenile idiopathic arthritis (JIA) are limited. Patient-Reported Outcomes Measurement Information System METHODS: In this single-center cross-sectional study, four self-reported questionnaires derived from the PROMIS RESULTS: Regardless of the domain (PROMIS CONCLUSIONS: Our study underscores the importance of JIA-specific scoring in clinical practice. While more research is needed to establish a single disease-specific scoring, our findings provide valuable insights into the negative influence of pain, fatigue, and mobility impairment on QoL in JIA. These results have the potential to significantly impact patient care and improve the health-related quality of life in children with JIA.