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Rome IV child rumination

Rome IV Child Rumination

Apply the Hyams 2016 Rome IV H1c child/adolescent rumination syndrome diagnostic criteria and return whether the published rumination box holds (rome_iv_child_rumination).

LIVE $0.005 USDC GET /api/calc/rome_iv_child_rumination

Markdown: /docs/rome-iv-child-rumination.md · Canonical: https://magentlab.com/docs/rome-iv-child-rumination

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

What it computes

Apply the Hyams 2016 Rome IV H1c child/adolescent rumination syndrome diagnostic criteria and return whether the published rumination box holds (rome_iv_child_rumination).

When to use

When an agent already has the five caller-assigned Hyams 2016 Rome IV H1c flags and needs whether the published child/adolescent rumination box holds. magent does not observe regurgitation.

When not to use

Not a medical device.
Not a diagnosis. magent does not diagnose rumination syndrome.
The caller assigns the five flags, including not_explained_by_another_condition_or_eating_disorder. magent does not observe regurgitation and does not examine the child.
This tool is Hyams 2016 Rome IV H1c child/adolescent rumination only. Not adult Rome IV rumination (Stanghellini 2016 B4). Not neonate/toddler rumination (Benninga 2016 G2).
GERD-treatment failure and weekly frequency are not required (Rome IV dropped those). Manometry is not parsed.

Formula

rome_iv_child_rumination iff repeated_regurgitation_rechewing_or_expulsion_soon_after_meals and does_not_occur_during_sleep and not_preceded_by_retching and not_explained_by_another_condition_or_eating_disorder and fulfilled_at_least_2_months (Hyams 2016 Rome IV H1c rumination syndrome)

Citation

Title: Childhood Functional Gastrointestinal Disorders: Child/Adolescent
Authors: Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M
Source: Gastroenterology. 2016;150(6):1456-1468
DOI: 10.1053/j.gastro.2016.02.015

Worked example

All five required flags

Given: does_not_occur_during_sleep=truefulfilled_at_least_2_months=truenot_explained_by_another_condition_or_eating_disorder=truenot_preceded_by_retching=truerepeated_regurgitation_rechewing_or_expulsion_soon_after_meals=true

Repeated regurgitation and rechewing or expulsion soon after meals is true
Does not occur during sleep is true
Not preceded by retching is true
Not explained by another condition or eating disorder is true
Fulfilled at least 2 months is true
rome_iv_child_rumination is true

Four required flags without 2-month duration

Given: does_not_occur_during_sleep=truefulfilled_at_least_2_months=falsenot_explained_by_another_condition_or_eating_disorder=truenot_preceded_by_retching=truerepeated_regurgitation_rechewing_or_expulsion_soon_after_meals=true

Repeated regurgitation and rechewing or expulsion soon after meals is true
Does not occur during sleep is true
Not preceded by retching is true
Not explained by another condition or eating disorder is true
Fulfilled at least 2 months is false
rome_iv_child_rumination is false

Also searched as

Rome IV child rumination
Hyams 2016 rumination
Rome IV H1c
child adolescent rumination syndrome
pediatric rumination
H1c rumination syndrome
Rome IV H1c rumination
functional rumination child

Try

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

/api/calc/rome_iv_child_rumination?repeated_regurgitation_rechewing_or_expulsion_soon_after_meals=true&does_not_occur_during_sleep=true&not_preceded_by_retching=true&not_explained_by_another_condition_or_eating_disorder=true&fulfilled_at_least_2_months=true

Full URL: https://api.magentlab.com/api/calc/rome_iv_child_rumination?repeated_regurgitation_rechewing_or_expulsion_soon_after_meals=true&does_not_occur_during_sleep=true&not_preceded_by_retching=true&not_explained_by_another_condition_or_eating_disorder=true&fulfilled_at_least_2_months=true

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/rome_iv_child_rumination?repeated_regurgitation_rechewing_or_expulsion_soon_after_meals=true&does_not_occur_during_sleep=true&not_preceded_by_retching=true&not_explained_by_another_condition_or_eating_disorder=true&fulfilled_at_least_2_months=true"

Parameters

Name	Type	Required	Description
`repeated_regurgitation_rechewing_or_expulsion_soon_after_meals`	boolean	required	Repeated regurgitation and rechewing or expulsion of food that begins soon after ingestion of a meal, as assigned (Hyams 2016 Rome IV H1c). The paper's 1a (begins soon after meals) is folded into this flag. true or false as assigned by the caller. magent does not observe regurgitation.
`does_not_occur_during_sleep`	boolean	required	The regurgitation does not occur during sleep, as assigned (Hyams 2016 Rome IV H1c). The paper's 1b (not during sleep) is this flag. true or false as assigned by the caller. magent does not observe regurgitation.
`not_preceded_by_retching`	boolean	required	Not preceded by retching, as assigned (Hyams 2016 Rome IV H1c). true or false as assigned by the caller. magent does not observe regurgitation.
`not_explained_by_another_condition_or_eating_disorder`	boolean	required	After appropriate evaluation, the symptoms cannot be fully explained by another medical condition, and an eating disorder has been ruled out, as assigned (Hyams 2016 Rome IV H1c). true or false as assigned by the caller. magent does not examine the child.
`fulfilled_at_least_2_months`	boolean	required	Criteria fulfilled for at least 2 months prior to diagnosis, as assigned (Hyams 2016 Rome IV H1c). true or false as assigned by the caller.

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/rome_iv_child_rumination 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": [
    {
      "does_not_occur_during_sleep": "true",
      "fulfilled_at_least_2_months": "true",
      "not_explained_by_another_condition_or_eating_disorder": "true",
      "not_preceded_by_retching": "true",
      "repeated_regurgitation_rechewing_or_expulsion_soon_after_meals": "true"
    },
    {
      "does_not_occur_during_sleep": "true",
      "fulfilled_at_least_2_months": "true",
      "not_explained_by_another_condition_or_eating_disorder": "true",
      "not_preceded_by_retching": "true",
      "repeated_regurgitation_rechewing_or_expulsion_soon_after_meals": "true"
    }
  ]
}

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/rome_iv_child_rumination",
  "items": [
    {
      "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": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M",
        "doi": "10.1053/j.gastro.2016.02.015",
        "id": "hyams-2016",
        "pmid": "27144632",
        "source": "Gastroenterology. 2016;150(6):1456-1468",
        "title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent"
      },
      "formula": "rome_iv_child_rumination",
      "formula_expression": "rome_iv_child_rumination iff repeated_regurgitation_rechewing_or_expulsion_soon_after_meals and does_not_occur_during_sleep and not_preceded_by_retching and not_explained_by_another_condition_or_eating_disorder and fulfilled_at_least_2_months (Hyams 2016 Rome IV H1c rumination syndrome)",
      "criteria": [
        {
          "factor": "repeated_regurgitation_rechewing_or_expulsion_soon_after_meals",
          "met": true
        },
        {
          "factor": "does_not_occur_during_sleep",
          "met": true
        },
        {
          "factor": "not_preceded_by_retching",
          "met": true
        },
        {
          "factor": "not_explained_by_another_condition_or_eating_disorder",
          "met": true
        },
        {
          "factor": "fulfilled_at_least_2_months",
          "met": true
        }
      ],
      "rome_iv_child_rumination": 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": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M",
        "doi": "10.1053/j.gastro.2016.02.015",
        "id": "hyams-2016",
        "pmid": "27144632",
        "source": "Gastroenterology. 2016;150(6):1456-1468",
        "title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent"
      },
      "formula": "rome_iv_child_rumination",
      "formula_expression": "rome_iv_child_rumination iff repeated_regurgitation_rechewing_or_expulsion_soon_after_meals and does_not_occur_during_sleep and not_preceded_by_retching and not_explained_by_another_condition_or_eating_disorder and fulfilled_at_least_2_months (Hyams 2016 Rome IV H1c rumination syndrome)",
      "criteria": [
        {
          "factor": "repeated_regurgitation_rechewing_or_expulsion_soon_after_meals",
          "met": true
        },
        {
          "factor": "does_not_occur_during_sleep",
          "met": true
        },
        {
          "factor": "not_preceded_by_retching",
          "met": true
        },
        {
          "factor": "not_explained_by_another_condition_or_eating_disorder",
          "met": true
        },
        {
          "factor": "fulfilled_at_least_2_months",
          "met": true
        }
      ],
      "rome_iv_child_rumination": true
    }
  ]
}

Response

Field	Type	Description
`formula`	string	rome_iv_child_rumination
`formula_expression`	string	Hyams 2016 Rome IV H1c child/adolescent rumination: repeated regurgitation and rechewing or expulsion soon after meals, not during sleep, not preceded by retching, not explained by another condition or eating disorder, and fulfilled at least 2 months
`rome_iv_child_rumination`	boolean	true only when all five required flags hold. Not a diagnosis.
`criteria`	array	Per-factor rows with factor and met for the five required flags
`citation`	object	Hyams 2016 Gastroenterology citation
`disclaimer`	string	Not-a-device notice

Example JSON

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

{
  "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": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M",
    "doi": "10.1053/j.gastro.2016.02.015",
    "id": "hyams-2016",
    "pmid": "27144632",
    "source": "Gastroenterology. 2016;150(6):1456-1468",
    "title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent"
  },
  "formula": "rome_iv_child_rumination",
  "formula_expression": "rome_iv_child_rumination iff repeated_regurgitation_rechewing_or_expulsion_soon_after_meals and does_not_occur_during_sleep and not_preceded_by_retching and not_explained_by_another_condition_or_eating_disorder and fulfilled_at_least_2_months (Hyams 2016 Rome IV H1c rumination syndrome)",
  "criteria": [
    {
      "factor": "repeated_regurgitation_rechewing_or_expulsion_soon_after_meals",
      "met": true
    },
    {
      "factor": "does_not_occur_during_sleep",
      "met": true
    },
    {
      "factor": "not_preceded_by_retching",
      "met": true
    },
    {
      "factor": "not_explained_by_another_condition_or_eating_disorder",
      "met": true
    },
    {
      "factor": "fulfilled_at_least_2_months",
      "met": true
    }
  ],
  "rome_iv_child_rumination": true
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_rome_iv_child_rumination`	Rome IV child rumination needs the Hyams 2016 child/adolescent H1c flags. Returned before settlement; you are not charged.
400	`invalid_flag`	boolean clinical flags must be true or false 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

Rome IV rumination — Apply the Stanghellini 2016 Rome IV rumination syndrome (B4) diagnostic criteria and return whether the published rumination box holds (rome_iv_rumination).
Rome IV child aerophagia — Apply the Hyams 2016 Rome IV H1d child/adolescent aerophagia diagnostic criteria and return whether the published aerophagia box holds (rome_iv_child_aerophagia).

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.