Enhancing PROMIS in Pediatric Pain, Rheumatology, and Rehabilitation Research

To evaluate the validity and responsiveness of the PROMIS pediatric item banks with longitudinal assessments in 120 children ages 8-18 with JIA. Concurrent validity will be assessed by measuring correlations between the PROMIS measures and legacy scales intended to measure the same health trait. Responsiveness of the PROMIS measures will be studied by evaluating longitudinal changes in PROMIS scores within subjects as compared to other clinical measures. It will also be assessed as between subject change, in those who by other clinical measures and legacy scales have stable clinical status compared to those with change in clinical status (improvement or deterioration). Items will be administered at three time points at 3-6 month intervals, depending on the timing of clinic visits.