According to the ACR criteria, how many clinical findings are needed out of 6?

According to the ACR criteria, how many clinical findings are needed out of 6?

• A. 2 out of 6
• B. 3 out of 6
• C. 4 out of 6
• D. 3 out of 6

Answer: (B)

The ACR knee OA criteria classify someone as having osteoarthritis when there is knee pain plus at least three of six clinical features: age over 50, morning stiffness lasting less than 30 minutes, crepitus, bony tenderness, bony enlargement, and no palpable warmth. So the minimum number of clinical findings needed out of six is three. If more than three features are present, the criteria are still met. Imaging isn’t required for classification, though X-rays can support the diagnosis.

The ACR knee OA criteria classify someone as having osteoarthritis when there is knee pain plus at least three of six clinical features: age over 50, morning stiffness lasting less than 30 minutes, crepitus, bony tenderness, bony enlargement, and no palpable warmth. So the minimum number of clinical findings needed out of six is three. If more than three features are present, the criteria are still met. Imaging isn’t required for classification, though X-rays can support the diagnosis.