{"uid":"cap_v6KVmgQhfP5N0sv-WoXRr","slug":"acr-eular-2010-ra-classification-calculator-aletaha-table-3-13671c93","name":"ACR/EULAR 2010 RA Classification Calculator (Aletaha Table 3)","description":"ACR/EULAR 2010 RA classification (Aletaha Table 3). Required: clinical_synovitis true. Score: joint involvement 0/1/2/3/5 + serology 0/2/3 + abnormal CRP or ESR 1 + duration ≥6 weeks 1; max 10. classified false if another disease better explains synovitis; else true if typical RA erosions or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI. magent does not examine joints or titer RF/ACPA.","url":"https://api.magentlab.com/api/calc/acr_eular_ra","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["clinical_synovitis","alternative_diagnosis_better","erosive_disease_typical_of_ra","joint_involvement","serology","abnormal_apr","duration_ge_6_weeks"],"properties":{"serology":{"enum":["negative","low_positive","high_positive"],"type":"string","description":"Caller-assigned Aletaha 2010 Table 3 serology row (at least one RF or ACPA test). High-positive RF or ACPA takes the high row. negative scores 0; low_positive scores 2; high_positive scores 3. magent does not titer RF or ACPA."},"abnormal_apr":{"type":"boolean","description":"Abnormal CRP or ESR as assigned by the caller (Aletaha 2010 Table 3). true scores 1; false (normal CRP and ESR) scores 0. magent does not assay CRP or ESR."},"joint_involvement":{"enum":["one_large","two_to_ten_large","one_to_three_small","four_to_ten_small","gt_ten_with_small"],"type":"string","description":"Caller-assigned highest Aletaha 2010 Table 3 joint-involvement category. magent does not count joints. Large = shoulders, elbows, hips, knees, ankles. Small = MCP, PIP, 2nd–5th MTP, thumb IP, wrists. DIP, 1st CMC, and 1st MTP are excluded. one_large scores 0; two_to_ten_large scores 1; one_to_three_small (with or without large) scores 2; four_to_ten_small (with or without large) scores 3; gt_ten_with_small (>10 joints, at least 1 small) scores 5."},"clinical_synovitis":{"type":"boolean","description":"Must be true. Aletaha 2010 entry: at least one joint with definite clinical synovitis (swelling) as assigned by the caller. false is invalid and is not classified=false. magent does not examine joints."},"duration_ge_6_weeks":{"type":"boolean","description":"Duration of symptoms ≥6 weeks as assigned by the caller (Aletaha 2010 Table 3). true scores 1; false scores 0. magent does not date symptom onset."},"alternative_diagnosis_better":{"type":"boolean","description":"Synovitis better explained by another disease (Aletaha 2010 target population). true still returns the Table 3 score but classified is false. magent does not assign an alternative diagnosis."},"erosive_disease_typical_of_ra":{"type":"boolean","description":"Erosive disease typical of RA with a history compatible with prior fulfillment of the 2010 criteria (Aletaha 2010 footnote). true classifies even if score <6. magent does not read films."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_96xVYLnmA-AYo-nt9Cido","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the ACR/EULAR 2010 rheumatoid arthritis classification score and returns a classified true/false result based on joint involvement, serology, acute-phase reactants, and symptom duration.","exampleAgentPrompt":"Score this patient for the ACR/EULAR 2010 RA classification: confirmed clinical synovitis present, joint involvement is four to ten small joints, serology is high positive (RF elevated >3× ULN), CRP is abnormal, symptoms have lasted more than 6 weeks, no alternative diagnosis better explains the findings, and no typical RA erosions on imaging.","exampleUseCases":[{"title":"Rheumatology clinic RA triage","prompt":"I have a patient with confirmed clinical synovitis, involvement of one to three small joints, low positive ACPA, normal CRP and ESR, symptoms for 8 weeks, no alternative diagnosis, and no erosive disease — can you run the 2010 ACR/EULAR RA classification score and tell me if they're classified as RA?"},{"title":"EHR automation for new arthritis consults","prompt":"For each new inflammatory arthritis referral in my queue, run the Aletaha 2010 RA classification: this patient has synovitis confirmed, greater than ten joints affected including small joints, high positive RF, abnormal ESR, symptoms for 3 months, no better alternative diagnosis, and no erosive findings — what's the total score and are they classified as RA?"},{"title":"Research cohort eligibility screening","prompt":"I'm building a cohort of patients who meet the 2010 ACR/EULAR RA classification criteria — check this subject: clinical synovitis present, two to ten large joints involved, serology negative, CRP normal, duration less than 6 weeks, no alternative diagnosis, no erosive disease — do they qualify?"}],"resultDescription":"Returns the total ACR/EULAR 2010 RA classification score (0–10) broken down by component (joint involvement 0/1/2/3/5, serology 0/2/3, acute-phase reactants 0/1, duration 0/1), and a boolean 'classified' field indicating whether the patient meets the RA classification threshold (score ≥6, or presence of typical erosive RA disease), subject to the exclusion that no other disease better explains the synovitis.","failureModes":["clinical_synovitis set to false — invalid input, endpoint requires true as entry criterion","Missing required query parameters (joint_involvement, serology, abnormal_apr, duration_ge_6_weeks) — returns validation error","Invalid enum value for joint_involvement or serology — returns schema error","Misclassification risk if caller supplies incorrect joint counts or serology tiers, as magent does not independently examine joints or titer RF/ACPA","Network or payment failure (x402 protocol) — call not executed"],"whenToPreferThis":"Use this endpoint when you need a structured, automated implementation of the ACR/EULAR 2010 RA classification algorithm (Aletaha Table 3) and the caller has already assigned clinical inputs (joint category, serology tier, APR status, duration). Prefer this over manual scoring or GPT-based estimation when auditability and exact score reproducibility are required. Do NOT use for the 1987 ACR RA criteria, SDAI, DAS28, or any endpoint requiring the system to physically examine joints or run lab assays — those inputs must come from the clinician or EHR.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:59:14.756Z","isFirstParty":false}