Juvenile idiopathic arthritis (AJI), is a frequent inflammatory disease in children, characterized by pain, arthritis, and deformities. Chronic inflammation leads to physical inactivity and can be associated with muscle weakness around affected joints, low bone strength, and mass(3). To our knowledge, no study has focused on the prevalence of sarcopenia in JIA and the data on the muscle disorder are lacking. The purpose of the present study is to detect sarcopenia and identify associated factors in children with JIA

Inclusion Criteria:

• children with juvenile idiopathic arthritis fulfilling the ILAR criteria

Exclusion Criteria:

• We excluded patients who have a prosthesis, nutritional problems, inflammatory bowel disease, coeliac disease, temporomandibular involvement, or another chronic disease.

For all patients, we collected the anthropometric data including weight, height, and expressed it as Z scores for age and sex. Body mass index (BMI) was calculated as weight (kg)/height (m2). The disease duration, AJI subtype, disease activity, and treatment were recorded.