{"slug":"api-magentlab-com-api-calc-4c-1ee81b","title":"Knight 2020 ISARIC 4C Mortality Score","host":"api.magentlab.com","method":"POST","resource":"https://api.magentlab.com/api/calc/4c","category":"other","description":"Knight 2020 ISARIC 4C Mortality Score: age (<50→0, 50–59→2, 60–69→4, 70–79→6, ≥80→7) + male 1 + comorbidity_count (0/1/≥2 → 0/1/2; caller-assigned Charlson-plus-obesity count) + RR (<20→0, 20–29→1, ≥30→2) + room-air SpO2 (<92→2) + GCS (<15→2) + urea (<7→0, 7–14→1, >14→3 mmol/L; or BUN/2.8) + CRP (<5","price_listed":0.005,"price_asked":0.005,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":295,"reported_calls_30d":0,"reported_payers_30d":0,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"items":[{"age":40,"bun_mg_dl":14,"comorbidity_count":0,"crp_mg_l":10,"gcs":15,"respiratory_rate":16,"sex":"female","spo2_percent":98,"urea_mmol_l":5},{"age":40,"bun_mg_dl":14,"comorbidity_count":0,"crp_mg_l":10,"gcs":15,"respiratory_rate":16,"sex":"female","spo2_percent":98,"urea_mmol_l":5}]},"method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"properties":{"items":{"items":{"properties":{"age":{"description":"Age in years (18-120). Knight 2020 Table 2: <50 scores 0; 50–59 scores 2; 60–69 scores 4; 70–79 scores 6; ≥80 scores 7.","type":"integer"},"bun_mg_dl":{"description":"BUN in mg/dL (3–140). Converted as urea_mmol_l = bun_mg_dl / 2.8.","type":"number"},"comorbidity_count":{"description":"Caller-assigned count of Charlson-plus-obesity comorbidities from Knight 2020 (integer 0–20). 0 scores 0; 1 scores 1; ≥2 scores 2. magent does not compute Charlson.","type":"integer"},"crp_mg_l":{"description":"C-reactive protein in mg/L (0–500). Knight 2020: <50 scores 0; 50–99 scores 1; ≥100 scores 2.","type":"number"},"gcs":{"description":"Caller-assigned total GCS as an integer 3–15. 15 scores 0; <15 scores 2 (Knight 2020). This API does not collect eye, verbal, or motor components.","type":"integer"},"respiratory_rate":{"description":"Respiratory rate in breaths/min (integer 4–80). Knight 2020: <20 scores 0; 20–29 scores 1; ≥30 scores 2. magent does not measure vitals.","type":"integer"},"sex":{"description":"Sex at birth (Knight 2020). female scores 0; male scores 1.","enum":["female","male"],"type":"string"},"spo2_percent":{"description":"Room-air SpO2 percent (50–100). Knight 2020: ≥92 scores 0; <92 scores 2. magent does not measure saturation.","type":"number"},"urea_mmol_l":{"description":"Serum urea in mmol/L (1–50). Provide this or bun_mg_dl, not both. Knight 2020: <7 scores 0; 7–14 inclusive scores 1; >14 scores 3.","type":"number"}},"required":["age","sex","comorbidity_count","respiratory_rate","spo2_percent","gcs","crp_mg_l"],"type":"object"},"maxItems":25,"minItems":1,"type":"array"}},"required":["items"],"type":"object"},"headers":{"additionalProperties":{"type":"string"},"type":"object"},"method":{"const":"POST","type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-28","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.005,"price_match":true,"latency_ms":295,"error":null}],"description_full":"Knight 2020 ISARIC 4C Mortality Score: age (<50→0, 50–59→2, 60–69→4, 70–79→6, ≥80→7) + male 1 + comorbidity_count (0/1/≥2 → 0/1/2; caller-assigned Charlson-plus-obesity count) + RR (<20→0, 20–29→1, ≥30→2) + room-air SpO2 (<92→2) + GCS (<15→2) + urea (<7→0, 7–14→1, >14→3 mmol/L; or BUN/2.8) + CRP (<50→0, 50–99→1, ≥100→2). Max 21. Table 5: low 0–3, intermediate 4–8, high 9–14, very high ≥15. Not a COVID-19 diagnosis or treatment order.","last_updated":"2026-09-28T14:25:03.102Z","schemes":["exact"]}