Which tools are used to measure ankylosing spondylitis (AS) disease activity?

Updated: Feb 02, 2021
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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In addition, numerous tools have been developed to measure AS disease activity, especially in the setting of clinical trials. [138, 139, 140] These tools include the following:

  • Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) - A questionnaire that assesses fatigue, pain (in the neck, back, and hip), peripheral joint pain and swelling, discomfort, and severity and duration of morning stiffness

  • Bath Ankylosing Spondylitis Functional Index (BASFI) - A questionnaire of physical function that evaluates dressing, bending, mobility, standing, stairs, and full-day activities

  • Bath Ankylosing Spondylitis Metrology Index (BASMI) - A physical evaluation of range of motion (ROM) of the cervical and lumbar spine

  • Assessment in Ankylosing Spondylitis (ASAS) - The ASAS core set of domains (parameters) measures disease activity and includes patient global assessment of disease activity, patient assessment of back pain, BASFI, morning stiffness, synovitis and enthesitis score, ESR, CRP level, and fatigue

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