Osteoarthritis is the most common articular disease affecting the joint in a comprehensive and progressive manner. It is a chronic pathology correlated with age since nearly one in two adults is affected by osteoarthritis. The care of osteoarthritis is based on pharmacological and non-pharmacological treatment. The latest recommendations support the non-pharmacological part including regular physical activity, therapeutic education and weight loss. Today tools are lacking for the patient and the practitioner to ensure long-term motivation and support.

Connected objects, as future-oriented tools, are a customizable way to meet the expectations of both patients and professionals. The main objective of this study is to analyze the expectations regarding the use of a smartphone application for monitoring and support in the practice of exercises and regular physical activity in patients osteoarthritic.

The secondary objective is to collect information on the use of connected objects dedicated to the management of osteoarthritis by patients and health professionals.

This study is aimed at patients with predominant knee osteoarthritis and health professionals with a link to the pathology.

A semi-directed interview according to a pre-established interview guide will be performed. Interviews are conducted by trained professionals and recorded with a dictaphone. Self-questionnaires are submitted to the patient after the interview.

The recordings are transcribed as quickly as possible in text format. The verbatim will then be coded (axial coding) then grouped by categories and then by themes.

The objective is to determine the expectations of patients and health professionals regarding a smartphone application dedicated to osteoarthritis.

This study will serve as a basis for designing a tool of this type to improve the long-term management of osteoarthritis.

Inclusion Criteria for Patient :

• Patient with osteoarthritis according to the criteria of the ACR (American College of Rheumatology), symptomatic and diagnosed in advance of inclusion by a specialist physician or not

Inclusion Criteria for Professional :

-Selected health professionals must be in practice at the time of inclusion. General practitioners, MPR (Physical and Rehabilitation Medicine), rheumatologists, physiotherapists, APA (Professor of Adapted Physical Activity) and pharmacists caring for arthrosic patients, either salaried or liberal and on the volunteering base.

Exclusion Criteria:

• Patients who do not meet the diagnostic criteria of the ACR (American College of Rheumatology)
• Patients with comprehension disorders which make it impossible to maintain and fill out questionnaires.
• Refusal to participate or already included in a therapeutic education workshop.

Patients : Adult with osteoarthritis Healt professionnal : Health professionals in contact with arthrostic patients