{"uid":"cap_bNXjNEZi1SCpS2veUzm19","slug":"triss-survival-probability-calculator-boyd-1987-mtos-80b4d24e","name":"TRISS Survival Probability Calculator (Boyd 1987 MTOS)","description":"TRISS (Boyd 1987): probability of survival from a caller-assigned Champion weighted RTS (0.0-7.8408), ISS (1-75), age (AgeIndex 0 if age < 55 else 1), and blunt or penetrating mechanism using original MTOS coefficients. Deterministic published arithmetic with citation. Not a triage order; not NISS; not ASCOT; not Champion 1995 revised coefficients.","url":"https://api.magentlab.com/api/calc/triss","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":["mechanism","rts","iss","age"],"properties":{"age":{"type":"integer","description":"Age in whole years 1-120. AgeIndex is 0 if age < 55 and 1 if age >= 55 (Boyd 1987)."},"iss":{"type":"integer","description":"Caller-assigned Injury Severity Score integer 1-75. magent does not compute ISS from AIS here."},"rts":{"type":"number","description":"Caller-assigned Champion weighted Revised Trauma Score (number 0.0-7.8408). magent does not recode GCS, SBP, or respiratory rate here."},"mechanism":{"enum":["blunt","penetrating"],"type":"string","description":"blunt or penetrating. Selects the Boyd 1987 original MTOS coefficient set. Required; magent does not infer mechanism."}}}},"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_MeEjY0HLsHw-vPBAnpskG","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 TRISS probability of survival using Boyd 1987 original MTOS coefficients from caller-supplied RTS, ISS, age, and trauma mechanism.","exampleAgentPrompt":"Calculate the TRISS probability of survival for a 45-year-old blunt trauma patient with a caller-assigned RTS of 6.5 and an ISS of 22, using the Boyd 1987 original MTOS coefficients.","exampleUseCases":[{"title":"Trauma registry quality benchmarking","prompt":"For our trauma audit, compute the TRISS survival probability for a 38-year-old blunt trauma patient with an RTS of 7.0 and ISS of 16 — use the original Boyd 1987 MTOS coefficients."},{"title":"Penetrating trauma outcome estimation","prompt":"What is the TRISS probability of survival for a 62-year-old penetrating trauma patient with an RTS of 4.0 and an ISS of 34?"},{"title":"Elderly blunt trauma scoring","prompt":"Run a TRISS calculation for a 70-year-old blunt mechanism trauma patient with an RTS of 5.9 and ISS of 29 — I need the Boyd 1987 survival probability."}],"resultDescription":"Returns a TRISS probability of survival (a decimal between 0 and 1) computed from the Boyd 1987 original MTOS logistic regression coefficients using the supplied weighted RTS, ISS, AgeIndex derived from patient age, and blunt or penetrating mechanism flag. The result is deterministic arithmetic with no model inference.","failureModes":["Missing required parameter (mechanism, rts, iss, or age) returns an error","RTS outside 0.0–7.8408 range may yield validation error or out-of-range result","ISS outside 1–75 integer range rejected","Age outside 1–120 rejected","Caller must pre-compute weighted Champion RTS; endpoint does not recode GCS, SBP, or RR","Payment failure (x402) if USDC not available"],"whenToPreferThis":"Use this endpoint when you need a deterministic, citable implementation of the original Boyd 1987 TRISS formula with MTOS coefficients. Prefer it over manual calculation when building trauma registries, audit tools, or clinical decision-support pipelines that require reproducible, publication-traceable survival probability estimates. Do not use for NISS, ASCOT, or Champion 1995 revised coefficient calculations.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:21:16.722Z","isFirstParty":false}