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Osteoarthritis of the Knee: Sensitivity and Specificity

Introduction: None written.

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Tags: Musculoskeletal Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Visits to Primary Care for Knee Pain 34% Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229
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The sensitivity and specificity of findings for Osteoarthritis of the Knee are listed below. See the left navigation bar to change the display.

Specific Findings

Finding SensitivitySpecificity Comments, Study
ACR Criteria
Duplicate Edit
84%89%

>=4 ACR Criteria: age older than 50 years, stiffness for less than 30 minutes, crepitus, bony tenderness, bony enlargement, and no palpable warmth

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

Sensitive Findings

Finding SensitivitySpecificity Comments, Study
ACR Criteria
Duplicate Edit
95%69%

>=3 ACR Criteria: age older than 50 years, stiffness for less than 30 minutes, crepitus, bony tenderness, bony enlargement, and no palpable warmth

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

ACR Criteria
Duplicate Edit
92%75%

>=5/9 ACR Clinical + Lab criteria: age older than 50 years, stiffness for less than 30 minutes, crepitus, bony tenderness, bony enlargement, and no palpable warmth, ESR < 40mm/hr, rheumatoid factor < 1:40, synovial fluid clear and viscous with leukocytes < 2x10^9/L

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

Poorly Diagnostic Findings

Finding SensitivitySpecificity Comments, Study
Osteophytes Edit 77%83%

on X-ray

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229