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Janssens 2010 Gout Diagnostic Rule Calculator (magent)
x402
Janssens 2010 Gout Diagnostic Rule Calculator (magent) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Computes the Janssens 2010 clinical diagnostic rule score for acute gouty arthritis without joint fluid analysis, returning a low/intermediate/high risk classification.
Price / call$0.005
Success—
StatusUnknown
How this service works
Janssens 2010 diagnostic rule for acute gouty arthritis without joint fluid: male 2, previous arthritis attack 2, onset within 1 day 0.5, joint redness 1, MTP1 2.5, hypertension or CVD 1.5, uric acid >5.88 mg/dL or >350 µmol/L 3.5; max 13. Low ≤4, intermediate 4.5–7.5, high ≥8. uric_acid_mg_dl or uric_acid_umol_l, not both. Deterministic published score; not a gout diagnosis; magent does not examine joints or replace synovial crystal analysis.
Output
Returns the total Janssens 2010 score (0–13), individual component point values, and a risk category: low (≤4), intermediate (4.5–7.5), or high (≥8), indicating the likelihood of acute gouty arthritis based on clinical features alone.
Example use cases
ED triage for suspected acute gout
“I have a male patient in the ED with sudden onset joint pain, redness over the first toe MTP joint, onset within 1 day, previous arthritis attack, no hypertension, and uric acid measured at 6.5 mg/dL — run the Janssens gout rule score for me.”
Clinic pre-assessment without aspiration
“Can you score my female patient using the Janssens 2010 gout rule? She has no prior arthritis attacks, no joint redness, MTP1 not involved, onset over 2 days, no hypertension or CVD, and uric acid is 390 µmol/L.”
Automated gout risk stratification in EHR workflow
“For this patient flagged in our system — male, previous arthritis attack yes, onset within 1 day yes, joint redness yes, MTP1 involved yes, hypertension yes, uric acid 8.1 mg/dL — what does the Janssens 2010 rule give as a risk category?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/gout_ruleWhen to prefer
Use this endpoint when you need a deterministic, reproducible implementation of the published Janssens 2010 gout diagnostic rule score from structured clinical data, especially when synovial fluid crystal analysis is unavailable. Prefer it over manual calculation to avoid arithmetic errors. It is not a substitute for synovial fluid analysis or clinical judgment.
Side effects
- Both uric_acid_mg_dl and uric_acid_umol_l provided simultaneously — only one unit system is accepted
- Missing required parameters (sex, previous_arthritis_attack, onset_within_1_day, joint_redness, mtp1_involvement, hypertension_or_cvd) returns validation error
- Uric acid value out of allowed range (mg/dL: 1–20; µmol/L: 60–1190) returns validation error
- Invalid enum value for sex field returns error
- Score does not constitute a clinical diagnosis and should not be interpreted as one
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/gout_rule",
"count": 2,
"items": [
{
"score": 0,
"formula": "gout_rule",
"citation": {
"id": "janssens-2010",
"doi": "10.1001/archinternmed.2010.196",
"pmid": "20625017",
"title": "A diagnostic rule for acute gouty arthritis in primary care without joint fluid analysis",
"source": "Arch Intern Med. 2010;170(13):1120-1126",
"authors": "Janssens HJEM, Fransen J, van de Lisdonk EH, van Riel PLCM, van Weel C, Janssen M"
},
"gout_band": "low",
"max_score": 13,
"components": [
{
"factor": "male",
"points": 0,
"present": false
},
{
"factor": "previous_arthritis_attack",
"points": 0,
"present": false
},
{
"factor": "onset_within_1_day",
"points": 0,
"present": false
},
{
"factor": "joint_redness",
"points": 0,
"present": false
},
{
"factor": "mtp1_involvement",
"points": 0,
"present": false
},
{
"factor": "hypertension_or_cvd",
"points": 0,
"present": false
},
{
"value": 5,
"factor": "uric_acid",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "gout_rule = 2*male + 2*previous_arthritis_attack + 0.5*onset_within_1_day + 1*joint_redness + 2.5*mtp1_involvement + 1.5*hypertension_or_cvd + 3.5*(uric_acid_mg_dl>5.88 | uric_acid_umol_l>350); Janssens 2010; max 13; low ≤4, intermediate 4.5-7.5, high ≥8"
},
{
"score": 0,
"formula": "gout_rule",
"citation": {
"id": "janssens-2010",
"doi": "10.1001/archinternmed.2010.196",
"pmid": "20625017",
"title": "A diagnostic rule for acute gouty arthritis in primary care without joint fluid analysis",
"source": "Arch Intern Med. 2010;170(13):1120-1126",
"authors": "Janssens HJEM, Fransen J, van de Lisdonk EH, van Riel PLCM, van Weel C, Janssen M"
},
"gout_band": "low",
"max_score": 13,
"components": [
{
"factor": "male",
"points": 0,
"present": false
},
{
"factor": "previous_arthritis_attack",
"points": 0,
"present": false
},
{
"factor": "onset_within_1_day",
"points": 0,
"present": false
},
{
"factor": "joint_redness",
"points": 0,
"present": false
},
{
"factor": "mtp1_involvement",
"points": 0,
"present": false
},
{
"factor": "hypertension_or_cvd",
"points": 0,
"present": false
},
{
"value": 5,
"factor": "uric_acid",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "gout_rule = 2*male + 2*previous_arthritis_attack + 0.5*onset_within_1_day + 1*joint_redness + 2.5*mtp1_involvement + 1.5*hypertension_or_cvd + 3.5*(uric_acid_mg_dl>5.88 | uric_acid_umol_l>350); Janssens 2010; max 13; low ≤4, intermediate 4.5-7.5, high ≥8"
}
]
}
}Tags
x402
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