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Good Positive and Negative Likelihood Ratios

Osteoarthritis of the Knee: Likelihood Ratios

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Prevalence

Population / Calculator	Prevalence	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 likelihood ratios of findings for Osteoarthritis of the Knee are listed below. See the left navigation bar to change the display.

Good Positive and Negative Likelihood Ratios

Finding	+LR	-LR	Comments, Study
ACR Criteria Duplicate	3.7	0.1	>=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
ACR Criteria Duplicate	3.1	0.1	>=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	7.6	0.2	>=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
Osteophytes	4.5	0.3	on X-ray Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229