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Rome IV infant functional constipation

Rome IV Infant Constipation

Apply the Benninga 2016 Rome IV G7 functional constipation (neonate/toddler) criteria and return features_met and whether the published infant constipation box holds (rome_iv_infant_constipation).

LIVE $0.005 USDC GET /api/calc/rome_iv_infant_constipation

Markdown: /docs/rome-iv-infant-constipation.md · Canonical: https://magentlab.com/docs/rome-iv-infant-constipation

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

What it computes

Apply the Benninga 2016 Rome IV G7 functional constipation (neonate/toddler) criteria and return features_met and whether the published infant constipation box holds (rome_iv_infant_constipation).

When to use

When an agent already has the caller-assigned Benninga 2016 Rome IV G7 flags (including toilet_trained and, when assigned, digital rectal exam as large_fecal_mass_in_rectum) and needs whether the published infant functional constipation box holds. magent does not examine the infant.

When not to use

  • Not a medical device.
  • Not a diagnosis. magent does not diagnose infant functional constipation.
  • The caller assigns the flags, including large_fecal_mass_in_rectum (digital rectal exam is caller-assigned). magent does not examine the infant.
  • This tool is Benninga 2016 Rome IV G7 functional constipation (neonate/toddler, infants up to 4 years) only. Not adult Rome IV FC (Mearin 2016 C2). Not child H3a.

Formula

rome_iv_infant_constipation iff duration_at_least_1_month and features_met >= 2; features_met always counts two_or_fewer_defecations_per_week, history_of_excessive_stool_retention, history_of_painful_or_hard_bowel_movements, history_of_large_diameter_stools, and large_fecal_mass_in_rectum; if toilet_trained also counts incontinence_after_toileting_at_least_weekly and large_diameter_stools_that_may_obstruct_toilet (Benninga 2016 Rome IV G7 Functional Constipation)

Citation

Title
Childhood Functional Gastrointestinal Disorders: Neonate/Toddler
Authors
Benninga MA, Faure C, Hyman PE, St James Roberts I, Schechter NL, Nurko S
Source
Gastroenterology. 2016;150(6):1443-1455
DOI
10.1053/j.gastro.2016.02.016

Worked example

Not toilet-trained, two of five core features, and 1-month duration

Given: duration_at_least_1_month=truehistory_of_excessive_stool_retention=falsehistory_of_large_diameter_stools=falsehistory_of_painful_or_hard_bowel_movements=trueincontinence_after_toileting_at_least_weekly=falselarge_diameter_stools_that_may_obstruct_toilet=falselarge_fecal_mass_in_rectum=falsetoilet_trained=falsetwo_or_fewer_defecations_per_week=true

  1. toilet_trained is false; extras are not counted
  2. two_or_fewer_defecations_per_week and history_of_painful_or_hard_bowel_movements are true (2 of 5 core)
  3. duration_at_least_1_month is true
  4. rome_iv_infant_constipation is true

1-month duration with only one of five core features

Given: duration_at_least_1_month=truehistory_of_excessive_stool_retention=falsehistory_of_large_diameter_stools=falsehistory_of_painful_or_hard_bowel_movements=falseincontinence_after_toileting_at_least_weekly=falselarge_diameter_stools_that_may_obstruct_toilet=falselarge_fecal_mass_in_rectum=falsetoilet_trained=falsetwo_or_fewer_defecations_per_week=true

  1. duration_at_least_1_month is true
  2. Only two_or_fewer_defecations_per_week is true (1 of 5 core)
  3. rome_iv_infant_constipation is false

Also searched as

  • Rome IV infant constipation
  • Benninga 2016 infant constipation
  • Rome IV G7
  • infant functional constipation
  • neonate toddler constipation
  • Rome IV G7 functional constipation
  • toilet trained infant constipation
  • Benninga 2016 G7

Try

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

/api/calc/rome_iv_infant_constipation?toilet_trained=false&two_or_fewer_defecations_per_week=true&history_of_excessive_stool_retention=false&history_of_painful_or_hard_bowel_movements=true&history_of_large_diameter_stools=false&large_fecal_mass_in_rectum=false&incontinence_after_toileting_at_least_weekly=false&large_diameter_stools_that_may_obstruct_toilet=false&duration_at_least_1_month=true

Full URL: https://api.magentlab.com/api/calc/rome_iv_infant_constipation?toilet_trained=false&two_or_fewer_defecations_per_week=true&history_of_excessive_stool_retention=false&history_of_painful_or_hard_bowel_movements=true&history_of_large_diameter_stools=false&large_fecal_mass_in_rectum=false&incontinence_after_toileting_at_least_weekly=false&large_diameter_stools_that_may_obstruct_toilet=false&duration_at_least_1_month=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_infant_constipation?toilet_trained=false&two_or_fewer_defecations_per_week=true&history_of_excessive_stool_retention=false&history_of_painful_or_hard_bowel_movements=true&history_of_large_diameter_stools=false&large_fecal_mass_in_rectum=false&incontinence_after_toileting_at_least_weekly=false&large_diameter_stools_that_may_obstruct_toilet=false&duration_at_least_1_month=true"

Parameters

Name Type Required Description
toilet_trained boolean required Toilet-trained as assigned (Benninga 2016 Rome IV G7). When true, incontinence_after_toileting_at_least_weekly and large_diameter_stools_that_may_obstruct_toilet count toward features_met. true or false as assigned by the caller. magent does not examine the infant.
two_or_fewer_defecations_per_week boolean required Two or fewer defecations per week, as assigned (Benninga 2016 Rome IV G7; one of five core features). true or false as assigned by the caller. magent does not examine the infant.
history_of_excessive_stool_retention boolean required History of excessive stool retention, as assigned (Benninga 2016 Rome IV G7; one of five core features). true or false as assigned by the caller. magent does not examine the infant.
history_of_painful_or_hard_bowel_movements boolean required History of painful or hard bowel movements, as assigned (Benninga 2016 Rome IV G7; one of five core features). true or false as assigned by the caller. magent does not examine the infant.
history_of_large_diameter_stools boolean required History of large-diameter stools, as assigned (Benninga 2016 Rome IV G7; one of five core features). true or false as assigned by the caller. magent does not examine the infant.
large_fecal_mass_in_rectum boolean required Large fecal mass in the rectum, as assigned (Benninga 2016 Rome IV G7; one of five core features). Digital rectal exam is caller-assigned. true or false as assigned by the caller. magent does not examine the infant.
incontinence_after_toileting_at_least_weekly boolean required At least one episode per week of incontinence after the acquisition of toileting skills, as assigned (Benninga 2016 Rome IV G7 extra; counted only when toilet_trained is true). true or false as assigned by the caller. magent does not examine the infant.
large_diameter_stools_that_may_obstruct_toilet boolean required History of large-diameter stools that may obstruct the toilet, as assigned (Benninga 2016 Rome IV G7 extra; counted only when toilet_trained is true). true or false as assigned by the caller. magent does not examine the infant.
duration_at_least_1_month boolean required Must include 1 month of at least 2 features, as assigned (Benninga 2016 Rome IV G7). true or false as assigned by the caller. magent does not examine the infant.

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_infant_constipation 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": [
    {
      "duration_at_least_1_month": "true",
      "history_of_excessive_stool_retention": "false",
      "history_of_large_diameter_stools": "false",
      "history_of_painful_or_hard_bowel_movements": "true",
      "incontinence_after_toileting_at_least_weekly": "false",
      "large_diameter_stools_that_may_obstruct_toilet": "false",
      "large_fecal_mass_in_rectum": "false",
      "toilet_trained": "false",
      "two_or_fewer_defecations_per_week": "true"
    },
    {
      "duration_at_least_1_month": "true",
      "history_of_excessive_stool_retention": "false",
      "history_of_large_diameter_stools": "false",
      "history_of_painful_or_hard_bowel_movements": "true",
      "incontinence_after_toileting_at_least_weekly": "false",
      "large_diameter_stools_that_may_obstruct_toilet": "false",
      "large_fecal_mass_in_rectum": "false",
      "toilet_trained": "false",
      "two_or_fewer_defecations_per_week": "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_infant_constipation",
  "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": "Benninga MA, Faure C, Hyman PE, St James Roberts I, Schechter NL, Nurko S",
        "doi": "10.1053/j.gastro.2016.02.016",
        "id": "benninga-2016",
        "pmid": "27144631",
        "source": "Gastroenterology. 2016;150(6):1443-1455",
        "title": "Childhood Functional Gastrointestinal Disorders: Neonate/Toddler"
      },
      "formula": "rome_iv_infant_constipation",
      "formula_expression": "rome_iv_infant_constipation iff duration_at_least_1_month and features_met >= 2; features_met always counts two_or_fewer_defecations_per_week, history_of_excessive_stool_retention, history_of_painful_or_hard_bowel_movements, history_of_large_diameter_stools, and large_fecal_mass_in_rectum; if toilet_trained also counts incontinence_after_toileting_at_least_weekly and large_diameter_stools_that_may_obstruct_toilet (Benninga 2016 Rome IV G7 Functional Constipation)",
      "criteria": [
        {
          "factor": "toilet_trained",
          "met": false
        },
        {
          "factor": "two_or_fewer_defecations_per_week",
          "met": true
        },
        {
          "factor": "history_of_excessive_stool_retention",
          "met": false
        },
        {
          "factor": "history_of_painful_or_hard_bowel_movements",
          "met": true
        },
        {
          "factor": "history_of_large_diameter_stools",
          "met": false
        },
        {
          "factor": "large_fecal_mass_in_rectum",
          "met": false
        },
        {
          "factor": "incontinence_after_toileting_at_least_weekly",
          "met": false
        },
        {
          "factor": "large_diameter_stools_that_may_obstruct_toilet",
          "met": false
        },
        {
          "factor": "duration_at_least_1_month",
          "met": true
        },
        {
          "value": 2,
          "factor": "features_ge_2",
          "met": true
        }
      ],
      "features_met": 2,
      "rome_iv_infant_constipation": 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": "Benninga MA, Faure C, Hyman PE, St James Roberts I, Schechter NL, Nurko S",
        "doi": "10.1053/j.gastro.2016.02.016",
        "id": "benninga-2016",
        "pmid": "27144631",
        "source": "Gastroenterology. 2016;150(6):1443-1455",
        "title": "Childhood Functional Gastrointestinal Disorders: Neonate/Toddler"
      },
      "formula": "rome_iv_infant_constipation",
      "formula_expression": "rome_iv_infant_constipation iff duration_at_least_1_month and features_met >= 2; features_met always counts two_or_fewer_defecations_per_week, history_of_excessive_stool_retention, history_of_painful_or_hard_bowel_movements, history_of_large_diameter_stools, and large_fecal_mass_in_rectum; if toilet_trained also counts incontinence_after_toileting_at_least_weekly and large_diameter_stools_that_may_obstruct_toilet (Benninga 2016 Rome IV G7 Functional Constipation)",
      "criteria": [
        {
          "factor": "toilet_trained",
          "met": false
        },
        {
          "factor": "two_or_fewer_defecations_per_week",
          "met": true
        },
        {
          "factor": "history_of_excessive_stool_retention",
          "met": false
        },
        {
          "factor": "history_of_painful_or_hard_bowel_movements",
          "met": true
        },
        {
          "factor": "history_of_large_diameter_stools",
          "met": false
        },
        {
          "factor": "large_fecal_mass_in_rectum",
          "met": false
        },
        {
          "factor": "incontinence_after_toileting_at_least_weekly",
          "met": false
        },
        {
          "factor": "large_diameter_stools_that_may_obstruct_toilet",
          "met": false
        },
        {
          "factor": "duration_at_least_1_month",
          "met": true
        },
        {
          "value": 2,
          "factor": "features_ge_2",
          "met": true
        }
      ],
      "features_met": 2,
      "rome_iv_infant_constipation": true
    }
  ]
}

Response

Field Type Description
formula string rome_iv_infant_constipation
formula_expression string Benninga 2016 Rome IV G7: duration at least 1 month and at least 2 features; extras count only when toilet-trained
features_met integer Count of true features among the five core flags, plus the two extras only when toilet_trained is true
rome_iv_infant_constipation boolean true only when duration_at_least_1_month and features_met >= 2. Not a diagnosis.
criteria array Per-factor rows with factor and met; features_ge_2 includes value (features_met)
citation object Benninga 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": "Benninga MA, Faure C, Hyman PE, St James Roberts I, Schechter NL, Nurko S",
    "doi": "10.1053/j.gastro.2016.02.016",
    "id": "benninga-2016",
    "pmid": "27144631",
    "source": "Gastroenterology. 2016;150(6):1443-1455",
    "title": "Childhood Functional Gastrointestinal Disorders: Neonate/Toddler"
  },
  "formula": "rome_iv_infant_constipation",
  "formula_expression": "rome_iv_infant_constipation iff duration_at_least_1_month and features_met >= 2; features_met always counts two_or_fewer_defecations_per_week, history_of_excessive_stool_retention, history_of_painful_or_hard_bowel_movements, history_of_large_diameter_stools, and large_fecal_mass_in_rectum; if toilet_trained also counts incontinence_after_toileting_at_least_weekly and large_diameter_stools_that_may_obstruct_toilet (Benninga 2016 Rome IV G7 Functional Constipation)",
  "criteria": [
    {
      "factor": "toilet_trained",
      "met": false
    },
    {
      "factor": "two_or_fewer_defecations_per_week",
      "met": true
    },
    {
      "factor": "history_of_excessive_stool_retention",
      "met": false
    },
    {
      "factor": "history_of_painful_or_hard_bowel_movements",
      "met": true
    },
    {
      "factor": "history_of_large_diameter_stools",
      "met": false
    },
    {
      "factor": "large_fecal_mass_in_rectum",
      "met": false
    },
    {
      "factor": "incontinence_after_toileting_at_least_weekly",
      "met": false
    },
    {
      "factor": "large_diameter_stools_that_may_obstruct_toilet",
      "met": false
    },
    {
      "factor": "duration_at_least_1_month",
      "met": true
    },
    {
      "value": 2,
      "factor": "features_ge_2",
      "met": true
    }
  ],
  "features_met": 2,
  "rome_iv_infant_constipation": 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_infant_constipation Rome IV infant functional constipation needs the Benninga 2016 neonate/toddler G7 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 Infant Dyschezia — Apply the Benninga 2016 Rome IV G6 infant dyschezia diagnostic criteria and return whether the published infant dyschezia box holds (rome_iv_infant_dyschezia).
  • Rome IV FC — Apply the Mearin 2016 Rome IV C2 functional constipation criteria and return symptom_count (0-6) and whether the published C2 box holds (rome_iv_fc).

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.