Juvenile Idiopathic Arthritis (JIA) is a heterogeneous, idiopathic, chronic inflammatory, rheumatic disease that is most common in childhood and is thought to involve immunological mechanisms in its etiopathogenesis. The physiology of children and adolescents is constantly changing due to the development and maturation of their systems. At the same time, the changes that this population shows, especially during the growth spurt and adolescence, can affect their performance in frequently used functional tests such as the 6-Minute Walk Test (6MWT). At the same time, it is emphasized that alternative tests are needed because the evaluation procedures of the 6MWT are not practical enough. The aim of this study is to investigate whether 30 Second Sit to Stand Test (30SST) is an alternative tool for assessing functional capacity in patients with JIA.

H0: 30SST is not an alternative tool for assessing functional capacity in patients with JIA.

H1: 30SST is an alternative tool for assessing functional capacity in patients with JIA.

The study will include 81 adolescent patients with oligoarticular/polyarticular JIA and 116 healthy adolescent between the ages of 12-18. The 6MWT, 30SST and 10 Stair Climb Test (10SCT) will be applied to the cases that meet the inclusion criteria to evaluate their functional capacity. Demographic data and test results of the participants will be recorded and evaluated with statistical analysis methods. We believe that alternative tests that can be used to evaluate functional capacity in patients with JIA will contribute to the literature as a result of this study.

Inclusion Criteria:

• Being 12-18 years old for both groups
• Having been diagnosed with JIA at least 6 months ago at the Istanbul Medical Faculty Pediatric Rheumatology Clinic for Usability and Validity Group
• Having a diagnosis of Oligoarticular/Polyarticular JIA for Usability and Validity Group
• Volunteer to participate in the study for both groups

Exclusion Criteria:

• History of trauma or surgery affecting the musculoskeletal system within the last 6 months
• Having an additional chronic disease affecting the musculoskeletal system for both groups
• Having vision or hearing problems for both groups
• Having cognitive impairment at a level where the person cannot understand the commands given for both groups
• Having vision or hearing problems for both groups
• Having had a corticosteroid injection into the knee or ankle within the last week for both groups
• Difference in length in the lower extremities for both groups

Individuals with JIA who come to Istanbul University Medical Faculty, Pediatric Rheumatology Clinic and meet the inclusion criteria for Usability and Validity Group Healthy adolescent participants aged 12-18 years