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Pediatric ulcerative colitis activity index (PUCAI)

PUCAI

Sum six caller-assigned Turner 2007 PUCAI item points and return the published total (max 85) with activity band.

LIVE $0.005 USDC GET /api/calc/pucai

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

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

What it computes

Sum six caller-assigned Turner 2007 PUCAI item points and return the published total (max 85) with activity band.

When to use

When an agent has already assigned Turner 2007 published point values for the six PUCAI items and needs the total and published activity band, not a diagnosis, adult Mayo score, or treatment order.

When not to use

Not a medical device and not a diagnosis of ulcerative colitis or a treatment order.
Each of the six items is a caller-assigned published point value from Turner 2007. magent does not examine the child.
Pediatric ulcerative colitis activity index (PUCAI). No age parameter. Not the adult Mayo score or UCDAI.
Activity bands follow Turner 2007: <10 remission, 10-34 mild (10 and 34 are mild), 35-64 moderate (35 and 64 are moderate), ≥65 severe (65 is severe). magent does not add unofficial adult cutoffs.

Formula

PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe

Citation

Title: Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study
Authors: Turner D, Otley AR, Mack D, et al.
Source: Gastroenterology. 2007;133(2):423-432
DOI: 10.1053/j.gastro.2007.05.029

Worked example

All items 0

Given: abdominal_pain=0activity_level=0nocturnal_stools=0rectal_bleeding=0stool_consistency_of_most=0stools_per_24h=0

abdominal_pain 0 + rectal_bleeding 0 + stool_consistency_of_most 0 + stools_per_24h 0 + nocturnal_stools 0 + activity_level 0
Score = 0 (max 85), activity_band remission

All items maximum

Given: abdominal_pain=10activity_level=10nocturnal_stools=10rectal_bleeding=30stool_consistency_of_most=10stools_per_24h=15

abdominal_pain 10 + rectal_bleeding 30 + stool_consistency_of_most 10 + stools_per_24h 15 + nocturnal_stools 10 + activity_level 10
Score = 85 (max 85), activity_band severe

Also searched as

PUCAI
pediatric ulcerative colitis activity index
Turner PUCAI
pediatric UC activity
PUCAI score
ulcerative colitis children
Turner 2007 PUCAI

Try

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

/api/calc/pucai?abdominal_pain=0&rectal_bleeding=0&stool_consistency_of_most=0&stools_per_24h=0&nocturnal_stools=0&activity_level=0

Full URL: https://api.magentlab.com/api/calc/pucai?abdominal_pain=0&rectal_bleeding=0&stool_consistency_of_most=0&stools_per_24h=0&nocturnal_stools=0&activity_level=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/pucai?abdominal_pain=0&rectal_bleeding=0&stool_consistency_of_most=0&stools_per_24h=0&nocturnal_stools=0&activity_level=0"

Parameters

Name	Type	Required	Description
`abdominal_pain`	integer	required	Caller-assigned Turner 2007 PUCAI abdominal pain points (integer 0, 5, or 10): 0 no pain; 5 pain can be ignored; 10 pain cannot be ignored. magent does not examine the child.
`rectal_bleeding`	integer	required	Caller-assigned Turner 2007 PUCAI rectal bleeding points (integer 0, 10, 20, or 30): 0 none; 10 small amount only, in less than 50% of stools; 20 small amount with most stools; 30 large amount (>50% of the stool content). magent does not examine the child.
`stool_consistency_of_most`	integer	required	Caller-assigned Turner 2007 PUCAI stool consistency of most stools points (integer 0, 5, or 10): 0 formed; 5 partially formed; 10 completely unformed. magent does not examine the child.
`stools_per_24h`	integer	required	Caller-assigned Turner 2007 PUCAI number of stools per 24 hours points (integer 0, 5, 10, or 15): 0 for 0-2 stools; 5 for 3-5; 10 for 6-8; 15 for >8. magent does not examine the child.
`nocturnal_stools`	integer	required	Caller-assigned Turner 2007 PUCAI nocturnal stools points (integer 0 or 10): 0 no; 10 yes (any episode causing wakening). magent does not examine the child.
`activity_level`	integer	required	Caller-assigned Turner 2007 PUCAI activity level points (integer 0, 5, or 10): 0 no limitation of activity; 5 occasional limitation of activity; 10 severe restricted activity. 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/pucai 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": [
    {
      "abdominal_pain": "0",
      "activity_level": "0",
      "nocturnal_stools": "0",
      "rectal_bleeding": "0",
      "stool_consistency_of_most": "0",
      "stools_per_24h": "0"
    },
    {
      "abdominal_pain": "0",
      "activity_level": "0",
      "nocturnal_stools": "0",
      "rectal_bleeding": "0",
      "stool_consistency_of_most": "0",
      "stools_per_24h": "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/pucai",
  "items": [
    {
      "components": [
        {
          "value": 0,
          "factor": "abdominal_pain",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "rectal_bleeding",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "stool_consistency_of_most",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "stools_per_24h",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "nocturnal_stools",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "activity_level",
          "points": 0,
          "present": true
        }
      ],
      "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": "Turner D, Otley AR, Mack D, et al.",
        "doi": "10.1053/j.gastro.2007.05.029",
        "id": "turner-2007",
        "pmid": "17681163",
        "source": "Gastroenterology. 2007;133(2):423-432",
        "title": "Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study"
      },
      "formula": "pucai",
      "formula_expression": "PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe",
      "max_score": 85,
      "score": 0,
      "activity_band": "remission",
      "abdominal_pain": 0,
      "activity_level": 0,
      "nocturnal_stools": 0,
      "rectal_bleeding": 0,
      "stool_consistency_of_most": 0,
      "stools_per_24h": 0
    },
    {
      "components": [
        {
          "value": 0,
          "factor": "abdominal_pain",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "rectal_bleeding",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "stool_consistency_of_most",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "stools_per_24h",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "nocturnal_stools",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "activity_level",
          "points": 0,
          "present": true
        }
      ],
      "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": "Turner D, Otley AR, Mack D, et al.",
        "doi": "10.1053/j.gastro.2007.05.029",
        "id": "turner-2007",
        "pmid": "17681163",
        "source": "Gastroenterology. 2007;133(2):423-432",
        "title": "Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study"
      },
      "formula": "pucai",
      "formula_expression": "PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe",
      "max_score": 85,
      "score": 0,
      "activity_band": "remission",
      "abdominal_pain": 0,
      "activity_level": 0,
      "nocturnal_stools": 0,
      "rectal_bleeding": 0,
      "stool_consistency_of_most": 0,
      "stools_per_24h": 0
    }
  ]
}

Response

Field	Type	Description
`formula`	string	pucai
`formula_expression`	string	Exact expression used
`score`	integer	PUCAI points 0-85
`max_score`	integer	Always 85
`activity_band`	string	Turner 2007 band: remission (<10), mild (10-34), moderate (35-64), or severe (≥65). Score 10 is mild; 34 is mild; 35 is moderate; 64 is moderate; 65 is severe. Not a diagnosis and not an adult Mayo cutoff.
`abdominal_pain`	integer	Caller-assigned abdominal pain points 0, 5, or 10
`rectal_bleeding`	integer	Caller-assigned rectal bleeding points 0, 10, 20, or 30
`stool_consistency_of_most`	integer	Caller-assigned stool consistency of most stools points 0, 5, or 10
`stools_per_24h`	integer	Caller-assigned stools per 24 hours points 0, 5, 10, or 15
`nocturnal_stools`	integer	Caller-assigned nocturnal stools points 0 or 10
`activity_level`	integer	Caller-assigned activity level points 0, 5, or 10
`components`	array	Per-item caller-assigned points
`citation`	object	Turner et al. Gastroenterology 2007 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": "abdominal_pain",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "rectal_bleeding",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "stool_consistency_of_most",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "stools_per_24h",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "nocturnal_stools",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "activity_level",
      "points": 0,
      "present": true
    }
  ],
  "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": "Turner D, Otley AR, Mack D, et al.",
    "doi": "10.1053/j.gastro.2007.05.029",
    "id": "turner-2007",
    "pmid": "17681163",
    "source": "Gastroenterology. 2007;133(2):423-432",
    "title": "Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study"
  },
  "formula": "pucai",
  "formula_expression": "PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe",
  "max_score": 85,
  "score": 0,
  "activity_band": "remission",
  "abdominal_pain": 0,
  "activity_level": 0,
  "nocturnal_stools": 0,
  "rectal_bleeding": 0,
  "stool_consistency_of_most": 0,
  "stools_per_24h": 0
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_pucai`	each PUCAI item must be a published point value from Turner 2007. 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

Forrest — Return the Forrest 1974 endoscopic lesion class (ia, ib, iia, iib, iic, or iii) and published description from a caller-assigned token.

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.