Classification Criteria for Osteoarthritis

ACR Classification Criteria for Osteoarthritis of the Hip

Traditional format
Hip pain plus at least two of the following:

  • ESR of less than 20 mm per hour

  • Femoral or acetabular osteophytes on radiographs

  • Joint space narrowing on radiographs

Classification-tree format
Hip pain plus femoral or acetabular osteophytes on radiographs

or

Hip pain plus joint space narrowing on radiographs and an ESR of less than 20 mm per hour

ESR = erythrocyte sedimentation rate.

ARA Classification Criteria for Idiopathic Osteoarthritis of the Knee

Traditional format
Knee pain plus osteophytes on radiographs and at least one of the following:

  • Patient age older than 50 years

  • Morning stiffness lasting 30 minutes or less

  • Crepitus on motion

Classification-tree format
Knee pain and osteophytes on radiographs

or

Knee pain plus patient age of 40 years or older, morning stiffness lasting 30 minutes or less and crepitus on motion

ACR Classification Criteria for Osteoarthritis of the Hand

Hand pain, aching or stiffness

plus

Hard tissue enlargement of two or more of 10 selected joints*

plus

Fewer than three swollen metacarpophalangeal joints

plus

Hard tissue enlargement of two or more distal interphalangeal joints

or

Deformity of two or more of 10 selected joints*

* –  10 selected joints are the second and third distal interphalangeal joints, the second and third proximal interphalangeal joints and the first carpometacarpal joints (of both hands).

 

References:

  1. Altman R, Alarcon G, Appelrouth D, Bloch D, Borenstein D, Brandt K, et al. The American College of Rheumatology criteria for the classification and reporting of osteoarthritis of the hip. Arthritis Rheum 1991;34:505-14. [Medline]
  2. Altman R, Asch E, Bloch D, Bole D, Borenstein K, Brandt K, et al. Development of criteria for the classification and reporting of osteoarthritis. Classification of osteoarthritis of the knee. Arthritis Rheum 1986;29:1039-49. [Medline]
  3. Altman R, Alarcon G, Appelrouth D, Bloch D, Borenstein K, Brandt K, et al. The American College of Rheumatology criteria for the classification and reporting of osteoarthritis of the hand. Arthritis Rheum 1990;33:1601-10. [Medline]

Created: Dec 04, 2005

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