Juvenile idiopathic arthritis in Jordan: single center experience.

Background: Juvenile idiopathic arthritis (JIA) is a heterogeneous group of disorders, including all forms of arthritis, which develops in children who are less than 16 years old. This study aimed to evaluate the clinical and laboratory features of JIA in a single center in Jordan.

Methods: A retrospective analysis of the electronic medical records of Pediatric patients diagnosed with JIA based on the International League of Associations for Rheumatology (ILAR) criteria during the period from 2015 to 2019 at the Pediatric Rheumatology Clinic in the Queen Rania Children's Hospital.

Development and initial validation of a composite disease activity score for systemic juvenile idiopathic arthritis.

Objective: To develop a composite disease activity score for systemic JIA (sJIA) and to provide preliminary evidence of its validity.

Methods: The systemic Juvenile Arthritis Disease Activity Score (sJADAS) was constructed by adding to the four items of the original JADAS a fifth item that aimed to quantify the activity of systemic features. Validation analyses were conducted on patients with definite or probable/possible sJIA enrolled at first visit or at the time of a flare, who had active systemic manifestations, which should include fever.