One of the advantages of using the measure, Dr. Coates noted, is that it can be used “cross-sectionally” and on any day to determine whether MDA is achieved. Furthermore, it confirms a satisfactory level of disease activity, not just a response to treatment, as the current American College of Rheumatology or Psoriatic Arthritis Response Criteria do.
The x-ray shows distal phalangeal joint damage from psoriatic arthritis.
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