# Cornell Assessment of Pediatric Delirium CAPD Status: LIVE Price: $0.005 USDC `GET /api/calc/capd` HTML: https://magentlab.com/docs/capd Markdown: https://magentlab.com/docs/capd.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes 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). ## 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 [Cornell Assessment of Pediatric Delirium: a valid, rapid, observational tool for screening delirium in the PICU](https://doi.org/10.1097/CCM.0b013e3182a66b76) Traube C, Silver G, Kearney J, Patel A, Atkinson TM, Yoon MJ, et al. Crit Care Med. 2014;42(3):656-663 DOI: [10.1097/CCM.0b013e3182a66b76](https://doi.org/10.1097/CCM.0b013e3182a66b76) ## Worked example ### All items at the never-delirium pole Given: `awareness=0, communication=0, delayed_response=0, eye_contact=0, inconsolable=0, purposeful_actions=0, restless=0, underactive=0` 1. Each item is 0 (never-delirium published pole, including reverse-scored eye_contact, purposeful_actions, awareness, and communication) 2. Score = 0 (max 32); screen_positive false (Traube 2014 cut point is ≥9) ### Reverse-scored item at never (4) Given: `awareness=0, communication=0, delayed_response=0, eye_contact=4, inconsolable=0, purposeful_actions=0, restless=0, underactive=0` 1. eye_contact is reverse-scored in Traube 2014; never contributes 4 2. Remaining items 0; score = 4; screen_positive false ### Score 8, just below the ≥9 cut Given: `awareness=1, communication=1, delayed_response=1, eye_contact=1, inconsolable=1, purposeful_actions=1, restless=1, underactive=1` 1. 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 8 2. Score = 8 (max 32); screen_positive false. No developmental-delay cutoff. ### Traube 2014 cut point ≥9 Given: `awareness=1, communication=1, delayed_response=1, eye_contact=1, inconsolable=1, purposeful_actions=1, restless=2, underactive=1` 1. 1 + 1 + 1 + 1 + 2 + 1 + 1 + 1 = 9 2. Score = 9 (max 32); screen_positive true (8 is below; ≥9 is screen-positive). No developmental-delay cutoff. ### All items 4 Given: `awareness=4, communication=4, delayed_response=4, eye_contact=4, inconsolable=4, purposeful_actions=4, restless=4, underactive=4` 1. Each item is 4 (maximum published pole) 2. 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 ## Parameters - `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. Method: `POST /api/calc/capd` Max items: 25 Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic) Status: 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: ```json { "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" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/capd Example 200: ```json { "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 fields - `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 Frozen fixture. Not a live lookup. ```json { "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 } ``` ## Errors - HTTP 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. - HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged. - HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged. - HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged. Shared HTTP 402 and 503: https://magentlab.com/docs/payments ## Related tools - [CAM-ICU](https://magentlab.com/docs/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. - GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall). - HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote. - Sign accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering. - Retry the same URL with PAYMENT-SIGNATURE (base64 JSON of accepted and payload). Magent attaches canonical extensions.bazaar on CDP verify/settle; echoing 402 bazaar is optional. - Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact nonce only after a new HTTP 402. - offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront. - offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization. - not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search. Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. That is not x402 batch-settlement (payment channels / vouchers). Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments Stdio MCP (one process per host): https://magentlab.com/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.