2015 ACR/EULAR Gout Classification Criteria
The 2015 ACR/EULAR gout classification criteria; MSU crystals are sufficient, otherwise weighted domains sum to 0-23 and >=8 classifies gout (Neogi 2015).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Entry criterion
- Yes
- Pattern of joint involvement
- 1st MTP involved (2)
- Episode characteristics
- Two characteristics (2)
- Time-course of episodes
- Recurrent typical episodes (2)
- Serum urate
- 8 to <10 mg/dL (3)
- Synovial-fluid analysis
- Not assessed (0)
Result: 2015 ACR/EULAR 9/23 — ≥ 8: classify as gout.
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What the result means
- Threshold
- ≥ 8 classifies as gout. Serum urate < 4 mg/dL scores −4 and a negative synovial tap −2; "not done" scores 0, distinct from those negatives.
What you enter
- Entry criterion (>=1 episode of peripheral joint / bursa swelling, pain or tenderness)
- Sufficient criterion: MSU crystals in a symptomatic joint / bursa or tophus
- Pattern of joint involvement (ever)
- Episode characteristics (erythema / intolerable to touch / difficulty walking)
- Time-course of episodes
- Serum urate (highest ever)
- Synovial-fluid analysis
- Clinical tophus (+4)
The other 2 fields
- Imaging urate deposition: US double-contour or DECT (+4)
- Imaging gout-related erosion on radiograph (+4)
How this is calculated
- Structure
- after the entry criterion, MSU crystals classify directly; otherwise weighted domains (pattern, characteristics, time-course, tophus, serum urate, synovial fluid, two imaging items) sum to 0–23.
Neogi T, Jansen TLTA, Dalbeth N, et al. 2015 Gout classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative. Arthritis Rheumatol. 2015;67(10):2557-2568. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.