Figure 1
From: Towards a better understanding of the role of psychological variables in arthritis outcome research
Current framework of functioning and health. The World Health Organization International Classification of Functioning, Disability and Health and the position of the variables included in the study by Brionez and colleagues [1]. AS, ankylosing spondylitis; BASFI, Bath Ankylosing Spondylitis Functional Index; BASRI, Bath Ankylosing Spondylitis Radiographic Index; ESR, erythrocyte sedimentation rate; NSAIDs, nonsteroidal anti-inflammatory drugs; PHQ, Patient Health Questionnaire to assess depression.