Neurology · LIVE

AWOL delirium prediction rule

AWOL

Sum the four Douglas 2013 AWOL items and return the combined-population observed delirium percent at that score.

LIVE $0.005 USDC GET /api/calc/awol

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

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

What it computes

Sum the four Douglas 2013 AWOL items and return the combined-population observed delirium percent at that score.

When to use

When an agent already has the four AWOL flags assigned and needs the published 0–4 total and Douglas 2013 combined-population observed delirium rates, not a delirium diagnosis and not CAM-ICU or 4AT.

When not to use

• Not a medical device and not a delirium diagnosis.
• magent does not interview the patient.
• Each flag is caller-assigned. magent does not collect an integer age.
• Observed delirium percents are the Douglas 2013 combined-population rates at scores 0–4 (2/4/14/20/64). This is not a binary high-risk cutoff.
• This is Douglas 2013 AWOL only. Not CAM-ICU. Not 4AT.

Formula

AWOL = age_ge_80 + failed_world_backward + not_oriented_to_place + illness_moderate_severe_or_moribund; each 1 if true; max 4; combined-population observed delirium 2/4/14/20/64% (Douglas 2013)

Citation

Title

The AWOL tool: derivation and validation of a delirium prediction rule

Authors

Douglas VC, Hessler CS, Dhaliwal G, Betjemann JP, Fukuda KA, Alameddine LR, Lucatorto R, Johnston SC, Josephson SA

Source

J Hosp Med. 2013;8(9):493-499

DOI

10.1002/jhm.2062

Worked example

Also searched as

• AWOL
• AWOL tool
• AWOL delirium
• Douglas AWOL
• age world orientation illness
• AWOL score
• delirium prediction rule
• Douglas 2013 AWOL
• AWOL WORLD backward
• nurse-rated illness AWOL

Try

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

/api/calc/awol?age_ge_80=false&failed_world_backward=false&not_oriented_to_place=false&illness_moderate_severe_or_moribund=false

Full URL: https://api.magentlab.com/api/calc/awol?age_ge_80=false&failed_world_backward=false&not_oriented_to_place=false&illness_moderate_severe_or_moribund=false

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/awol?age_ge_80=false&failed_world_backward=false&not_oriented_to_place=false&illness_moderate_severe_or_moribund=false"

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/awol 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_ge_80": "false",
      "failed_world_backward": "false",
      "illness_moderate_severe_or_moribund": "false",
      "not_oriented_to_place": "false"
    },
    {
      "age_ge_80": "false",
      "failed_world_backward": "false",
      "illness_moderate_severe_or_moribund": "false",
      "not_oriented_to_place": "false"
    }
  ]
}

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/awol",
  "items": [
    {
      "components": [
        {
          "factor": "age_ge_80",
          "points": 0,
          "present": false
        },
        {
          "factor": "failed_world_backward",
          "points": 0,
          "present": false
        },
        {
          "factor": "not_oriented_to_place",
          "points": 0,
          "present": false
        },
        {
          "factor": "illness_moderate_severe_or_moribund",
          "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": "Douglas VC, Hessler CS, Dhaliwal G, Betjemann JP, Fukuda KA, Alameddine LR, Lucatorto R, Johnston SC, Josephson SA",
        "doi": "10.1002/jhm.2062",
        "id": "douglas-2013",
        "pmid": "23922253",
        "source": "J Hosp Med. 2013;8(9):493-499",
        "title": "The AWOL tool: derivation and validation of a delirium prediction rule"
      },
      "formula": "awol",
      "formula_expression": "AWOL = age_ge_80 + failed_world_backward + not_oriented_to_place + illness_moderate_severe_or_moribund; each 1 if true; max 4; combined-population observed delirium 2/4/14/20/64% (Douglas 2013)",
      "max_score": 4,
      "score": 0,
      "observed_delirium_percent": 2
    },
    {
      "components": [
        {
          "factor": "age_ge_80",
          "points": 0,
          "present": false
        },
        {
          "factor": "failed_world_backward",
          "points": 0,
          "present": false
        },
        {
          "factor": "not_oriented_to_place",
          "points": 0,
          "present": false
        },
        {
          "factor": "illness_moderate_severe_or_moribund",
          "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": "Douglas VC, Hessler CS, Dhaliwal G, Betjemann JP, Fukuda KA, Alameddine LR, Lucatorto R, Johnston SC, Josephson SA",
        "doi": "10.1002/jhm.2062",
        "id": "douglas-2013",
        "pmid": "23922253",
        "source": "J Hosp Med. 2013;8(9):493-499",
        "title": "The AWOL tool: derivation and validation of a delirium prediction rule"
      },
      "formula": "awol",
      "formula_expression": "AWOL = age_ge_80 + failed_world_backward + not_oriented_to_place + illness_moderate_severe_or_moribund; each 1 if true; max 4; combined-population observed delirium 2/4/14/20/64% (Douglas 2013)",
      "max_score": 4,
      "score": 0,
      "observed_delirium_percent": 2
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "factor": "age_ge_80",
      "points": 0,
      "present": false
    },
    {
      "factor": "failed_world_backward",
      "points": 0,
      "present": false
    },
    {
      "factor": "not_oriented_to_place",
      "points": 0,
      "present": false
    },
    {
      "factor": "illness_moderate_severe_or_moribund",
      "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": "Douglas VC, Hessler CS, Dhaliwal G, Betjemann JP, Fukuda KA, Alameddine LR, Lucatorto R, Johnston SC, Josephson SA",
    "doi": "10.1002/jhm.2062",
    "id": "douglas-2013",
    "pmid": "23922253",
    "source": "J Hosp Med. 2013;8(9):493-499",
    "title": "The AWOL tool: derivation and validation of a delirium prediction rule"
  },
  "formula": "awol",
  "formula_expression": "AWOL = age_ge_80 + failed_world_backward + not_oriented_to_place + illness_moderate_severe_or_moribund; each 1 if true; max 4; combined-population observed delirium 2/4/14/20/64% (Douglas 2013)",
  "max_score": 4,
  "score": 0,
  "observed_delirium_percent": 2
}

Client errors (HTTP 400)

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

Related tools

• CAM-ICU — Apply the Ely 2001 CAM-ICU algorithm and return whether delirium is present from four caller-assigned features.
• 4AT — Sum the Bellelli 2014 4AT items and return unlikely (0), possible cognitive impairment (1–3), or possible delirium (≥4).
• AMT-4 — Sum the four Swain 1997 AMT-4 items from caller-assigned correct/incorrect flags and return whether the score is less than 4 (impaired).
• AMT-10 — Sum the ten Hodkinson 1972 AMT-10 items from caller-assigned correct/incorrect flags and return the 0–10 total. Hodkinson 1972 did not publish a diagnostic cutoff.

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.