Infection / VTE · LIVE

PRIEST COVID-19 clinical severity (Goodacre)

PRIEST

Sum the Goodacre 2021 PRIEST points from NEWS2 Chart 1 Scale 1 vitals, alertness, inspired oxygen, age, sex, and performance status, and return whether the total is ≤4.

LIVE $0.005 USDC GET /api/calc/priest

Markdown: /docs/priest.md · Canonical: https://magentlab.com/docs/priest

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Sum the Goodacre 2021 PRIEST points from NEWS2 Chart 1 Scale 1 vitals, alertness, inspired oxygen, age, sex, and performance status, and return whether the total is ≤4.

When to use

When an agent already has NEWS2 Scale 1 vitals, age, sex, and performance and needs the published Goodacre 2021 PRIEST total and the ≤4 low adverse-outcome flag, not NEWS2, 4C, or an admission order.

When not to use

• Not a medical device and not an admission, discharge, or treatment order. magent does not measure vitals or examine the patient.
• SpO2 uses NEWS2 Chart 1 Scale 1 only. magent does not implement NEWS2 SpO2 Scale 2 (prescribed 88-92% target in hypercapnic respiratory failure).
• This is not NEWS2 and not the ISARIC 4C Mortality Score. Alertness is caller-assigned alert (0) or confused_or_not_alert (3); it is not full ACVPU and not GCS.
• Age is 16-120 years as published for PRIEST adults. Age 80 scores 3; age >80 scores 4.
• low_adverse_outcome_risk is true only when the total is ≤4 (Goodacre 2021: scores of four or less). magent does not invent named high-risk groups or mortality percents.

Formula

PRIEST = rr_points + spo2_scale1_points + oxygen_points + temp_points + sbp_points + hr_points + alertness_points + sex_points + age_points + performance_points; NEWS2 Chart 1 Scale 1 vitals (not Scale 2) + age + sex + performance; Goodacre 2021 Fig 2; max 29; low_adverse_outcome_risk iff score ≤4

Citation

Title

Derivation and validation of a clinical severity score for acutely ill adults with suspected COVID-19: The PRIEST observational cohort study

Authors

Goodacre S, Thomas B, Sutton L, et al.

Source

PLoS One. 2021;16(1):e0245840

DOI

10.1371/journal.pone.0245840

Worked example

Also searched as

• PRIEST score
• PRIEST COVID-19
• Pandemic Respiratory Infection Emergency System Triage
• Goodacre PRIEST
• COVID-19 clinical severity score
• PRIEST observational cohort
• NEWS2 plus age sex performance

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/priest?age_years=70&sex=male&respiratory_rate=16&spo2_percent=98&heart_rate_bpm=70&systolic_mm_hg=120&temperature_c=37.0&alertness=alert&supplemental_oxygen=false&performance_status=unrestricted

Full URL: https://api.magentlab.com/api/calc/priest?age_years=70&sex=male&respiratory_rate=16&spo2_percent=98&heart_rate_bpm=70&systolic_mm_hg=120&temperature_c=37.0&alertness=alert&supplemental_oxygen=false&performance_status=unrestricted

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/priest?age_years=70&sex=male&respiratory_rate=16&spo2_percent=98&heart_rate_bpm=70&systolic_mm_hg=120&temperature_c=37.0&alertness=alert&supplemental_oxygen=false&performance_status=unrestricted"

Parameters

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/priest Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

• 1 to 25 items. Each item uses the same keys as the GET query parameters.
• POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
• The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
• HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
• Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
• x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "age_years": "70",
      "alertness": "alert",
      "heart_rate_bpm": "70",
      "performance_status": "unrestricted",
      "respiratory_rate": "16",
      "sex": "male",
      "spo2_percent": "98",
      "supplemental_oxygen": "false",
      "systolic_mm_hg": "120",
      "temperature_c": "37.0"
    },
    {
      "age_years": "70",
      "alertness": "alert",
      "heart_rate_bpm": "70",
      "performance_status": "unrestricted",
      "respiratory_rate": "16",
      "sex": "male",
      "spo2_percent": "98",
      "supplemental_oxygen": "false",
      "systolic_mm_hg": "120",
      "temperature_c": "37.0"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/priest",
  "items": [
    {
      "components": [
        {
          "value": 70,
          "factor": "age_years",
          "points": 3,
          "present": true
        },
        {
          "value": "male",
          "factor": "sex",
          "points": 1,
          "present": true
        },
        {
          "value": 16,
          "factor": "respiratory_rate",
          "points": 0,
          "present": false
        },
        {
          "value": 98.0,
          "factor": "spo2_percent",
          "points": 0,
          "present": false
        },
        {
          "value": 70,
          "factor": "heart_rate_bpm",
          "points": 0,
          "present": false
        },
        {
          "value": 120,
          "factor": "systolic_mm_hg",
          "points": 0,
          "present": false
        },
        {
          "value": 37.0,
          "factor": "temperature_c",
          "points": 0,
          "present": false
        },
        {
          "value": "alert",
          "factor": "alertness",
          "points": 0,
          "present": false
        },
        {
          "value": false,
          "factor": "supplemental_oxygen",
          "points": 0,
          "present": false
        },
        {
          "value": "unrestricted",
          "factor": "performance_status",
          "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.",
      "citation": {
        "authors": "Goodacre S, Thomas B, Sutton L, et al.",
        "doi": "10.1371/journal.pone.0245840",
        "id": "goodacre-2021",
        "pmid": "33481930",
        "source": "PLoS One. 2021;16(1):e0245840",
        "title": "Derivation and validation of a clinical severity score for acutely ill adults with suspected COVID-19: The PRIEST observational cohort study"
      },
      "formula": "priest",
      "formula_expression": "PRIEST = rr_points + spo2_scale1_points + oxygen_points + temp_points + sbp_points + hr_points + alertness_points + sex_points + age_points + performance_points; NEWS2 Chart 1 Scale 1 vitals (not Scale 2) + age + sex + performance; Goodacre 2021 Fig 2; max 29; low_adverse_outcome_risk iff score ≤4",
      "max_score": 29,
      "score": 4,
      "systolic_mm_hg": 120,
      "age_years": 70,
      "sex": "male",
      "heart_rate_bpm": 70,
      "temperature_c": 37.0,
      "spo2_percent": 98.0,
      "respiratory_rate": 16,
      "supplemental_oxygen": false,
      "alertness": "alert",
      "low_adverse_outcome_risk": true,
      "performance_status": "unrestricted"
    },
    {
      "components": [
        {
          "value": 70,
          "factor": "age_years",
          "points": 3,
          "present": true
        },
        {
          "value": "male",
          "factor": "sex",
          "points": 1,
          "present": true
        },
        {
          "value": 16,
          "factor": "respiratory_rate",
          "points": 0,
          "present": false
        },
        {
          "value": 98.0,
          "factor": "spo2_percent",
          "points": 0,
          "present": false
        },
        {
          "value": 70,
          "factor": "heart_rate_bpm",
          "points": 0,
          "present": false
        },
        {
          "value": 120,
          "factor": "systolic_mm_hg",
          "points": 0,
          "present": false
        },
        {
          "value": 37.0,
          "factor": "temperature_c",
          "points": 0,
          "present": false
        },
        {
          "value": "alert",
          "factor": "alertness",
          "points": 0,
          "present": false
        },
        {
          "value": false,
          "factor": "supplemental_oxygen",
          "points": 0,
          "present": false
        },
        {
          "value": "unrestricted",
          "factor": "performance_status",
          "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.",
      "citation": {
        "authors": "Goodacre S, Thomas B, Sutton L, et al.",
        "doi": "10.1371/journal.pone.0245840",
        "id": "goodacre-2021",
        "pmid": "33481930",
        "source": "PLoS One. 2021;16(1):e0245840",
        "title": "Derivation and validation of a clinical severity score for acutely ill adults with suspected COVID-19: The PRIEST observational cohort study"
      },
      "formula": "priest",
      "formula_expression": "PRIEST = rr_points + spo2_scale1_points + oxygen_points + temp_points + sbp_points + hr_points + alertness_points + sex_points + age_points + performance_points; NEWS2 Chart 1 Scale 1 vitals (not Scale 2) + age + sex + performance; Goodacre 2021 Fig 2; max 29; low_adverse_outcome_risk iff score ≤4",
      "max_score": 29,
      "score": 4,
      "systolic_mm_hg": 120,
      "age_years": 70,
      "sex": "male",
      "heart_rate_bpm": 70,
      "temperature_c": 37.0,
      "spo2_percent": 98.0,
      "respiratory_rate": 16,
      "supplemental_oxygen": false,
      "alertness": "alert",
      "low_adverse_outcome_risk": true,
      "performance_status": "unrestricted"
    }
  ]
}

Response

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "components": [
    {
      "value": 70,
      "factor": "age_years",
      "points": 3,
      "present": true
    },
    {
      "value": "male",
      "factor": "sex",
      "points": 1,
      "present": true
    },
    {
      "value": 16,
      "factor": "respiratory_rate",
      "points": 0,
      "present": false
    },
    {
      "value": 98.0,
      "factor": "spo2_percent",
      "points": 0,
      "present": false
    },
    {
      "value": 70,
      "factor": "heart_rate_bpm",
      "points": 0,
      "present": false
    },
    {
      "value": 120,
      "factor": "systolic_mm_hg",
      "points": 0,
      "present": false
    },
    {
      "value": 37.0,
      "factor": "temperature_c",
      "points": 0,
      "present": false
    },
    {
      "value": "alert",
      "factor": "alertness",
      "points": 0,
      "present": false
    },
    {
      "value": false,
      "factor": "supplemental_oxygen",
      "points": 0,
      "present": false
    },
    {
      "value": "unrestricted",
      "factor": "performance_status",
      "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.",
  "citation": {
    "authors": "Goodacre S, Thomas B, Sutton L, et al.",
    "doi": "10.1371/journal.pone.0245840",
    "id": "goodacre-2021",
    "pmid": "33481930",
    "source": "PLoS One. 2021;16(1):e0245840",
    "title": "Derivation and validation of a clinical severity score for acutely ill adults with suspected COVID-19: The PRIEST observational cohort study"
  },
  "formula": "priest",
  "formula_expression": "PRIEST = rr_points + spo2_scale1_points + oxygen_points + temp_points + sbp_points + hr_points + alertness_points + sex_points + age_points + performance_points; NEWS2 Chart 1 Scale 1 vitals (not Scale 2) + age + sex + performance; Goodacre 2021 Fig 2; max 29; low_adverse_outcome_risk iff score ≤4",
  "max_score": 29,
  "score": 4,
  "systolic_mm_hg": 120,
  "age_years": 70,
  "sex": "male",
  "heart_rate_bpm": 70,
  "temperature_c": 37.0,
  "spo2_percent": 98.0,
  "respiratory_rate": 16,
  "supplemental_oxygen": false,
  "alertness": "alert",
  "low_adverse_outcome_risk": true,
  "performance_status": "unrestricted"
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

Related tools

• NEWS2 — Compute the RCP 2017 National Early Warning Score 2 from respiratory rate, SpO2 (Scale 1 or Scale 2), supplemental oxygen, temperature, systolic BP, heart rate, and caller-assigned ACVPU.
• 4C — Sum the Knight 2020 ISARIC 4C Mortality Score items and return the published Table 5 band (low, intermediate, high, or very high).

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

• HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
• exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
• HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
• Execution is timeout-bounded and concurrency-capped.
• Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.