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Simplified Disease Activity Index in Rheumatoid Arthritis

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Simplified Disease Activity Index in Rheumatoid Arthritis, Simplified Disease Activity Index, SDAI

  • See Also
  1. Clinical Disease Activity Index in Rheumatoid Arthritis
  2. Rheumatoid Arthritis
  3. Rheumatoid Arthritis Diagnosis
  4. Rheumatoid Arthritis Management
  • Indications
  1. Rheumatoid Arthritis Severity Assessment
  • Criteria
  1. Tender joint count (out of 28 joints)
  2. Swollen join count (out of 28 joints)
  3. C-Reactive Protein
  4. Patient Global Assessment of Disease Activity (on visual analog scale)
  5. Evaluator Global Assessment of Disease Activity (on visual analog scale)
  • Interpretation
  1. Total Score (range of possible scores 0 to 86)
    1. Score <= 3.3: Remission
    2. Score <= 20: Low disease activity
    3. Score <= 40: Moderate disease activity
    4. Score >40: High disease activity
  2. Change from prior SDAI
    1. Score Decrease 10 to 21: Minor Improvement
    2. Score Decrease >=22: Major Improvement
  • Resources
  1. Simple Disease Activity Index (MDCalc)
    1. https://www.mdcalc.com/calc/2194/simple-disease-activity-index-sdai-rheumatoid-arthritis
  • References
  1. Smolen (2003) Rheumatology 42(2):244-57 +PMID: 12595618 [PubMed]