{"uid":"cap_jyifDWhlq4kBLY_C913WY","slug":"chosen-score-calculator-covid-home-safely-now-7a43ab7a","name":"CHOSEN Score Calculator (COVID Home Safely Now)","description":"Levine 2020 CHOSEN (COVID Home Safely Now): age 18-45 +5, 46-59 +2, 60-73 +1, >73 +0; SpO2 <94 +0, 94-96 +9, 97-98 +14, >98 +21; albumin g/dL <2.8 +0, 2.8-3.3 +5, 3.4-3.7 +15, >3.7 +29. Score 0-55. Cutpoint 30 (derivation sensitivity 83%, specificity 82%). Higher score favored event-free status in the paper. Not a discharge order.","url":"https://api.magentlab.com/api/calc/chosen","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":["age","spo2_percent","albumin_g_dl"],"properties":{"age":{"type":"integer","description":"Age in years (integer 18-120). Levine 2020 Figure 2: 18-45 → 5; 46-59 → 2; 60-73 → 1; >73 → 0. Age 73 scores 1; age 74 scores 0. Adults as in the derivation cohort."},"albumin_g_dl":{"type":"number","description":"Serum albumin in g/dL (1.0-6.0). Levine 2020 Figure 2: <2.8 → 0; 2.8-3.3 → 5; 3.4-3.7 → 15; >3.7 → 29. Not g/L. magent does not assay albumin."},"spo2_percent":{"type":"number","description":"Oxygen saturation percent (50-100). Levine 2020 Figure 2: <94 → 0; 94-96 → 9; 97-98 → 14; >98 → 21. magent does not measure SpO2."}}}},"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_zdJjMcgavfa6UZ4RR31IH","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 Levine 2020 CHOSEN score (0–55) for COVID-19 patients based on age, SpO2, and serum albumin to estimate likelihood of event-free home monitoring.","exampleAgentPrompt":"Run the CHOSEN score for a 54-year-old COVID patient with an SpO2 of 97% and serum albumin of 3.9 g/dL so I can see whether their score is above the 30-point cutpoint for likely event-free status.","exampleUseCases":[{"title":"ED triage for COVID home monitoring","prompt":"My patient is a 41-year-old COVID-positive adult with SpO2 reading of 98% and serum albumin of 3.5 g/dL — can you calculate the CHOSEN score and tell me if they're above the cutpoint of 30?"},{"title":"Telemedicine discharge risk check","prompt":"I'm doing a telehealth visit with a 67-year-old COVID patient whose SpO2 is 95% and albumin came back at 2.9 g/dL — run the Levine 2020 CHOSEN score for them so I know where they land."},{"title":"Retrospective cohort chart review","prompt":"For our chart review, calculate the CHOSEN score for each of these patients: first one is 80 years old, SpO2 96%, albumin 3.6 g/dL — what does their score come out to?"}],"resultDescription":"Returns the computed CHOSEN score (integer 0–55) derived from age-band, SpO2-band, and albumin-band point contributions as defined in Levine 2020 Figure 2. Scores ≥30 indicate higher likelihood of event-free status based on the derivation cohort (sensitivity 83%, specificity 82%). The result is a clinical decision-support value, not a discharge order.","failureModes":["Missing required query parameters (age, spo2_percent, albumin_g_dl) returns a 400 error","Age outside 18–120 integer range returns validation error","SpO2 outside 50–100 range returns validation error","Albumin outside 1.0–6.0 g/dL range returns validation error","Albumin provided in wrong units (g/L instead of g/dL) will silently produce incorrect score","Payment not attached or insufficient USDC balance returns 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when you need a standardized, validated CHOSEN score computation per the exact Levine 2020 band definitions, avoiding manual point-lookup errors. Prefer it over general-purpose LLM arithmetic for auditability and consistency. Use when building clinical triage workflows, telehealth discharge tools, or retrospective research pipelines that require reproducible COVID home monitoring risk scores.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:39:23.534Z","isFirstParty":false}