Gaffo et al developed provisional criteria for the diagnosis of a flare of activity in a patient with gout. The authors are from multiple institutions from around the world.
Patient selection: established gout
Parameters:
(1) any warm joint reported by the patient
(2) any swollen joint reported by the patient
(3) patient perceived that s/he is having a flare
(4) patient reported pain at rest on a 10 cm VAS scale
Parameter
Finding
Points
warm joint
no
0
yes
1
swollen joint
no
0
yes
1
perceived flare
no
0
yes
1
pain at rest
<= 3 cm
0
> 3 cm
1
total score =
= SUM(points for all 4 parameters)
Interpretation:
• minimum score: 0
• maximum score: 4
• A score of >= 3 had a sensitivity of 91% and specificity of 82% (Youden 0.73).
• A score of 4 has a sensitivity of 72% and specificity of 96% (Youden 0.68).
• A score of >= 2 had a sensitivity of 98% and specificity of 60% (Youden 0.58).
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