A two-step multi-centre study with 240 rheumatoid arthritis patients.

A two-step multi-centre study containing:

A test-retest study including 180 patients filling in questionnaires and performing joint assessments to assess reliability of patient generated data

AND

An agreement study focusing on questionnaires and joint assessments performed by 60 patients, a medical student, a physician and by an ultrasound-examinator assessing agreement between the four assessors

Inclusion Criteria:

• Diagnosed with RA ≥ 12 months
• DAS28-CRP < 5,1

Exclusion Criteria:

• Dementia or other linguistic/cognitive/physical deficiency that prevents participation
• Vision impairment that prevents the use of the devices and computer