Intervention group: Volunteers who were diagnosed with RA by a rheumatologist according to the 2010 criteria of the American College of Rheumatology (ACR)/European Rheumatology Association (ACR/EULAR) will be included in the study.

Person-centered lifestyle intervention in individuals with rheumatoid arthritis is planned as 2 sessions per week, for a total of 4 weeks.

Control group: Volunteers who were diagnosed with RA by a rheumatologist according to the 2010 criteria of the American College of Rheumatology (ACR)/European Rheumatology Association (ACR/EULAR) will be included in the study.

For the control group, they will be called twice a week for 4 weeks and inquired about their general condition.

Lifestyle intervention is a combined approach that encourages individuals to change their lifestyles by increasing participation in meaningful readings. This program aims to facilitate the individual's self-development of healthy routines and habits; It includes techniques such as patient education, occupational self-analysis, problem-solving, motivation generation, and implementation of behaviors to prevent and manage disease-related symptoms.

COPM is a standardized measurement tool that reflects the change in an individual's personal perception of activity performance and satisfaction over a period of time. It is designed to identify the activity performance problems of the individual, to give priority to these areas and to develop person-centered practice. In this assessment scale, activity performance problems faced by the person in the areas of self-care, productivity, play-free time are recorded with a semi-structured interview method. Among these areas, the person is asked to select 5 problems that he prioritizes and to rate each problem area between 1 and 10 points. A higher score on this rating indicates greater performance and satisfaction. The calculation is made by dividing the total performance and satisfaction score by the number of selected activities.

Disease Activity Score (DAS-28), which includes 28 joints, is used to monitor objective and subjective measures of disease activity in individuals with RA [33, 34]. The DAS-28 has been shown to have good validity and internal consistency reliability for monitoring this patient population [35] and is able to distinguish between patients with high and low disease activity [33]. Objective measures for rheumatoid arthritis are the number of swollen joints and the level of inflammation (erythrocyte sedimentation rate or C-reactive protein); subjective measures are the number of tender joints and the patient's overall health assessment. Disease activity scores range from 0 (not completely active) to 9.4 (very active). It is classified as ≤ 3.2 = mild, >3.2 to ≤5.1 = moderate, and >5.1 = severe [36].