Gouty Arthritis Diagnostic Rule
Diagnostic rule for gouty arthritis which doesn't require joint fluid analysis.
<-- Gender
<-- Previous patient-reported arthritis attack
<-- Onset of pain within 1 day
<-- Joint redness
<-- 1st MTP joint involvement
<-- Hypertension or cardiovascular disease
<-- Serum uric acid level > 5.88 mg/dl (350 mmol/L)
Score --> scorescore=(Q1)+(Q2)+(Q3)+(Q4)+(Q5)+(Q6)+(Q7)
Interpretation --> prevalencescore=(Q1)+(Q2)+(Q3)+(Q4)+(Q5)+(Q6)+(Q7);score>7.9?'87 percent probability of gout (positive predictive value)':score>4?'probability of gout is uncertain - further testing warranted':'95 percent probability of NOT having gout (negative predictive value)'
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References
#1 Janssens HJ, Fransen J, van de Lisdonk EH, van Riel PL, van Weel C, Janssen M. A diagnostic rule for acute gouty arthritis in primary care without joint fluid analysis. Arch Intern Med. 2010 Jul 12;170(13):1120-6.
#2 Kienhorst LB, Janssens HJ, Fransen J, Janssen M. The validation of a diagnostic rule for gout without joint fluid analysis: a prospective study. Rheumatology (Oxford). 2015 Apr;54(4):609-14.

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