Gouty Arthritis Diagnostic Rule

Gouty Arthritis Diagnostic Rule
Diagnostic rule for gouty arthritis which doesn't require joint fluid analysis.
[select name="Q1" value="Female (0 points)=0|Male (2 points)=2"] <-- Gender
[select name="Q2" value="No (0 points)=0|Yes (2 points)=2"] <-- Previous patient-reported arthritis attack
[select name="Q3" value="No (0 points)=0|Yes (0.5 points)=0.5"] <-- Onset of pain within 1 day
[select name="Q4" value="No (0 points)=0|Yes (1 point)=1"] <-- Joint redness
[select name="Q5" value="No (0 points)=0|Yes (2.5 points)=2.5"] <-- 1st MTP joint involvement
[select name="Q6" value="No (0 points)=0|Yes (1.5 points)=1.5"] <-- Hypertension or cardiovascular disease
[select name="Q7" value="No (0 points)=0|Yes (3.5 points)=3.5"] <-- Serum uric acid level > 5.88 mg/dl (350 mmol/L)
Score --> [calc value="score=(Q1)+(Q2)+(Q3)+(Q4)+(Q5)+(Q6)+(Q7)" memo="score"]
Interpretation --> [calc value="score=(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)'" memo="prevalence"]
[checkbox memo="display/hide references" name="footnotes" value=""][conditional field="footnotes" condition="(footnotes).isNot('')"]
References
[link url="https://www.ncbi.nlm.nih.gov/pubmed/20625017" memo="#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.
[link url="https://www.ncbi.nlm.nih.gov/pubmed/25231179" memo="#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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