Cornell Assessment of Pediatric Delirium

CAPD

Sum eight caller-assigned Traube 2014 CAPD integers (0-4; eye_contact, purposeful_actions, awareness, and communication reverse-scored in that paper so never contributes 4) and return the 0-32 total and whether it meets this paper's screen-positive cut point (score ≥9).

LIVE $0.005 USDC GET /api/calc/capd

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

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

What it computes

When to use

When an agent has already assigned Traube 2014 CAPD 0-4 integers for all eight items (after that paper's reverse key for eye contact, purposeful actions, awareness, and communication) and needs the published total and ≥9 screen, not a psychiatric diagnosis or CAM-ICU.

When not to use

Not a medical device and not a psychiatric diagnosis.
magent does not examine the child. Each of the eight items is a caller-assigned integer 0-4 from Traube 2014 (never/rarely/sometimes/often/always after that paper's reverse key). magent does not interpret the items.
This is Traube 2014 CAPD only. Items eye_contact, purposeful_actions, awareness, and communication (items 1-4) are reverse-scored in that paper so never contributes 4 and always contributes 0; the caller assigns the published 0-4 after that reverse key. Total 0-32.
Traube 2014 published a screen-positive cut point of ≥9 (screen_positive is true iff score ≥9). magent does not invent additional developmental-delay cutoffs and does not treat a score as a psychiatric diagnosis.

Formula

CAPD = eye_contact + purposeful_actions + awareness + communication + restless + inconsolable + underactive + delayed_response; each caller-assigned 0-4 as in Traube 2014 (eye_contact, purposeful_actions, awareness, and communication reverse-scored in that paper so never contributes 4 and always contributes 0; 0 is the never-delirium published pole); max 32; Traube 2014 screen-positive iff score ≥ 9

Citation

Title: Cornell Assessment of Pediatric Delirium: a valid, rapid, observational tool for screening delirium in the PICU
Authors: Traube C, Silver G, Kearney J, Patel A, Atkinson TM, Yoon MJ, et al.
Source: Crit Care Med. 2014;42(3):656-663
DOI: 10.1097/CCM.0b013e3182a66b76

Worked example

All items at the never-delirium pole

Given: awareness=0communication=0delayed_response=0eye_contact=0inconsolable=0purposeful_actions=0restless=0underactive=0

Each item is 0 (never-delirium published pole, including reverse-scored eye_contact, purposeful_actions, awareness, and communication)
Score = 0 (max 32); screen_positive false (Traube 2014 cut point is ≥9)

Reverse-scored item at never (4)

Given: awareness=0communication=0delayed_response=0eye_contact=4inconsolable=0purposeful_actions=0restless=0underactive=0

eye_contact is reverse-scored in Traube 2014; never contributes 4
Remaining items 0; score = 4; screen_positive false

Score 8, just below the ≥9 cut

Given: awareness=1communication=1delayed_response=1eye_contact=1inconsolable=1purposeful_actions=1restless=1underactive=1

1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 8
Score = 8 (max 32); screen_positive false. No developmental-delay cutoff.

Traube 2014 cut point ≥9

Given: awareness=1communication=1delayed_response=1eye_contact=1inconsolable=1purposeful_actions=1restless=2underactive=1

1 + 1 + 1 + 1 + 2 + 1 + 1 + 1 = 9
Score = 9 (max 32); screen_positive true (8 is below; ≥9 is screen-positive). No developmental-delay cutoff.

All items 4

Given: awareness=4communication=4delayed_response=4eye_contact=4inconsolable=4purposeful_actions=4restless=4underactive=4

Each item is 4 (maximum published pole)
Score = 32 (max 32); screen_positive true

Also searched as

CAPD
Cornell Assessment of Pediatric Delirium
Traube CAPD
pediatric delirium screen
PICU delirium CAPD
Traube 2014 CAPD
Cornell pediatric delirium

Try

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

/api/calc/capd?eye_contact=0&purposeful_actions=0&awareness=0&communication=0&restless=0&inconsolable=0&underactive=0&delayed_response=0

Full URL: https://api.magentlab.com/api/calc/capd?eye_contact=0&purposeful_actions=0&awareness=0&communication=0&restless=0&inconsolable=0&underactive=0&delayed_response=0

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/capd?eye_contact=0&purposeful_actions=0&awareness=0&communication=0&restless=0&inconsolable=0&underactive=0&delayed_response=0"

Parameters

Name	Type	Required	Description
`eye_contact`	integer	required	Caller-assigned Traube 2014 CAPD item 1 (integer 0-4). Reverse-scored in that paper: does the child make eye contact with the caregiver. 0 is always (never-delirium pole after reverse scoring); 4 is never (never contributes 4). magent does not examine the child.
`purposeful_actions`	integer	required	Caller-assigned Traube 2014 CAPD item 2 (integer 0-4). Reverse-scored in that paper: are the child's actions purposeful. 0 is always (never-delirium pole after reverse scoring); 4 is never (never contributes 4). magent does not examine the child.
`awareness`	integer	required	Caller-assigned Traube 2014 CAPD item 3 (integer 0-4). Reverse-scored in that paper: is the child aware of his/her surroundings. 0 is always (never-delirium pole after reverse scoring); 4 is never (never contributes 4). magent does not examine the child.
`communication`	integer	required	Caller-assigned Traube 2014 CAPD item 4 (integer 0-4). Reverse-scored in that paper: does the child communicate needs and wants. 0 is always (never-delirium pole after reverse scoring); 4 is never (never contributes 4). magent does not examine the child.
`restless`	integer	required	Caller-assigned Traube 2014 CAPD item 5 (integer 0-4): is the child restless. Adds as published (0 never, never-delirium pole, through 4 always). magent does not examine the child.
`inconsolable`	integer	required	Caller-assigned Traube 2014 CAPD item 6 (integer 0-4): is the child inconsolable. Adds as published (0 never, never-delirium pole, through 4 always). magent does not examine the child.
`underactive`	integer	required	Caller-assigned Traube 2014 CAPD item 7 (integer 0-4): is the child underactive — very little movement while awake. Adds as published (0 never, never-delirium pole, through 4 always). magent does not examine the child.
`delayed_response`	integer	required	Caller-assigned Traube 2014 CAPD item 8 (integer 0-4): does it take the child a long time to respond to interactions. Adds as published (0 never, never-delirium pole, through 4 always). magent does not examine the child.

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/capd 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": [
    {
      "awareness": "0",
      "communication": "0",
      "delayed_response": "0",
      "eye_contact": "0",
      "inconsolable": "0",
      "purposeful_actions": "0",
      "restless": "0",
      "underactive": "0"
    },
    {
      "awareness": "0",
      "communication": "0",
      "delayed_response": "0",
      "eye_contact": "0",
      "inconsolable": "0",
      "purposeful_actions": "0",
      "restless": "0",
      "underactive": "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/capd",
  "items": [
    {
      "components": [
        {
          "value": 0,
          "factor": "eye_contact",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "purposeful_actions",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "awareness",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "communication",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "restless",
          "points": 0,
          "present": true,
          "reverse_scored": false
        },
        {
          "value": 0,
          "factor": "inconsolable",
          "points": 0,
          "present": true,
          "reverse_scored": false
        },
        {
          "value": 0,
          "factor": "underactive",
          "points": 0,
          "present": true,
          "reverse_scored": false
        },
        {
          "value": 0,
          "factor": "delayed_response",
          "points": 0,
          "present": true,
          "reverse_scored": 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": "Traube C, Silver G, Kearney J, Patel A, Atkinson TM, Yoon MJ, et al.",
        "doi": "10.1097/CCM.0b013e3182a66b76",
        "id": "traube-2014",
        "pmid": "24145848",
        "source": "Crit Care Med. 2014;42(3):656-663",
        "title": "Cornell Assessment of Pediatric Delirium: a valid, rapid, observational tool for screening delirium in the PICU"
      },
      "formula": "capd",
      "formula_expression": "CAPD = eye_contact + purposeful_actions + awareness + communication + restless + inconsolable + underactive + delayed_response; each caller-assigned 0-4 as in Traube 2014 (eye_contact, purposeful_actions, awareness, and communication reverse-scored in that paper so never contributes 4 and always contributes 0; 0 is the never-delirium published pole); max 32; Traube 2014 screen-positive iff score ≥ 9",
      "max_score": 32,
      "score": 0,
      "screen_positive": false
    },
    {
      "components": [
        {
          "value": 0,
          "factor": "eye_contact",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "purposeful_actions",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "awareness",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "communication",
          "points": 0,
          "present": true,
          "reverse_scored": true
        },
        {
          "value": 0,
          "factor": "restless",
          "points": 0,
          "present": true,
          "reverse_scored": false
        },
        {
          "value": 0,
          "factor": "inconsolable",
          "points": 0,
          "present": true,
          "reverse_scored": false
        },
        {
          "value": 0,
          "factor": "underactive",
          "points": 0,
          "present": true,
          "reverse_scored": false
        },
        {
          "value": 0,
          "factor": "delayed_response",
          "points": 0,
          "present": true,
          "reverse_scored": 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": "Traube C, Silver G, Kearney J, Patel A, Atkinson TM, Yoon MJ, et al.",
        "doi": "10.1097/CCM.0b013e3182a66b76",
        "id": "traube-2014",
        "pmid": "24145848",
        "source": "Crit Care Med. 2014;42(3):656-663",
        "title": "Cornell Assessment of Pediatric Delirium: a valid, rapid, observational tool for screening delirium in the PICU"
      },
      "formula": "capd",
      "formula_expression": "CAPD = eye_contact + purposeful_actions + awareness + communication + restless + inconsolable + underactive + delayed_response; each caller-assigned 0-4 as in Traube 2014 (eye_contact, purposeful_actions, awareness, and communication reverse-scored in that paper so never contributes 4 and always contributes 0; 0 is the never-delirium published pole); max 32; Traube 2014 screen-positive iff score ≥ 9",
      "max_score": 32,
      "score": 0,
      "screen_positive": false
    }
  ]
}

Response

Field	Type	Description
`formula`	string	capd
`formula_expression`	string	Exact expression used
`score`	integer	CAPD points 0-32
`max_score`	integer	32
`screen_positive`	boolean	true iff score ≥ 9 (Traube 2014 cut point). Not a psychiatric diagnosis. Not a developmental-delay cutoff.
`components`	array	Per-item caller-assigned points (reverse-scored items flagged)
`citation`	object	Traube et al. Crit Care Med 2014 citation
`disclaimer`	string	Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "value": 0,
      "factor": "eye_contact",
      "points": 0,
      "present": true,
      "reverse_scored": true
    },
    {
      "value": 0,
      "factor": "purposeful_actions",
      "points": 0,
      "present": true,
      "reverse_scored": true
    },
    {
      "value": 0,
      "factor": "awareness",
      "points": 0,
      "present": true,
      "reverse_scored": true
    },
    {
      "value": 0,
      "factor": "communication",
      "points": 0,
      "present": true,
      "reverse_scored": true
    },
    {
      "value": 0,
      "factor": "restless",
      "points": 0,
      "present": true,
      "reverse_scored": false
    },
    {
      "value": 0,
      "factor": "inconsolable",
      "points": 0,
      "present": true,
      "reverse_scored": false
    },
    {
      "value": 0,
      "factor": "underactive",
      "points": 0,
      "present": true,
      "reverse_scored": false
    },
    {
      "value": 0,
      "factor": "delayed_response",
      "points": 0,
      "present": true,
      "reverse_scored": 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": "Traube C, Silver G, Kearney J, Patel A, Atkinson TM, Yoon MJ, et al.",
    "doi": "10.1097/CCM.0b013e3182a66b76",
    "id": "traube-2014",
    "pmid": "24145848",
    "source": "Crit Care Med. 2014;42(3):656-663",
    "title": "Cornell Assessment of Pediatric Delirium: a valid, rapid, observational tool for screening delirium in the PICU"
  },
  "formula": "capd",
  "formula_expression": "CAPD = eye_contact + purposeful_actions + awareness + communication + restless + inconsolable + underactive + delayed_response; each caller-assigned 0-4 as in Traube 2014 (eye_contact, purposeful_actions, awareness, and communication reverse-scored in that paper so never contributes 4 and always contributes 0; 0 is the never-delirium published pole); max 32; Traube 2014 screen-positive iff score ≥ 9",
  "max_score": 32,
  "score": 0,
  "screen_positive": false
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_capd`	CAPD inputs must be the eight caller-assigned 0-4 Cornell items from Traube 2014. Returned before settlement; you are not charged.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

CAM-ICU — Apply the Ely 2001 CAM-ICU algorithm and return whether delirium is present from four caller-assigned features.

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.