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Rome IV OIC Criteria Calculator (C6)
x402
Rome IV OIC Criteria Calculator (C6) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Evaluates whether a patient meets the Rome IV C6 criteria for Opioid-Induced Constipation (OIC) based on eight caller-assigned boolean flags.
Price / call$0.005
Success—
StatusUnknown
How this service works
Mearin 2016 Rome IV C6 OIC. rome_iv_oic is true iff new or worsening constipation when initiating, changing, or increasing opioid therapy, at least 2 of 6 symptoms (straining, lumpy/hard stools, incomplete evacuation, anorectal obstruction, manual maneuvers, fewer than 3 SBM/week), and loose stools rare without laxatives. symptom_count is 0-6. Caller assigns eight flags. magent does not examine the patient or prescribe opioids. Not a diagnosis, not functional constipation C2, not IBS, not child.
Output
Returns a rome_iv_oic boolean (true if criteria are met) and a symptom_count integer (0–6) representing how many of the six C6 symptom items the caller flagged as true. Does not provide a diagnosis, does not examine the patient, and does not apply to children or IBS/functional constipation C2.
Example use cases
OIC screening during opioid initiation
“My patient just started opioids and is complaining of new constipation. They report straining over 25% of the time, hard stools over 25%, fewer than 3 bowel movements a week, and loose stools never happen without laxatives. No other symptoms. Does this meet Rome IV OIC criteria?”
Distinguishing OIC from functional constipation
“I need to know if this patient's constipation is opioid-induced rather than functional. Their opioid dose was recently increased, and they now have incomplete evacuation more than 25% of the time and straining over 25%, but no hard stools, no anorectal obstruction, no manual maneuvers, no reduced SBM frequency, and loose stools are rare without laxatives. Run the Rome IV C6 OIC check.”
Clinical audit of opioid patients
“For this opioid patient in our audit: constipation is new since opioid start, straining yes, hard stools yes, incomplete evacuation yes, anorectal obstruction no, manual maneuvers no, fewer than 3 SBM per week yes, loose stools rare without laxatives yes. What's the Rome IV OIC result and symptom count?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/rome_iv_oicWhen to prefer
Use this endpoint when you need a fast, reproducible computation of the Rome IV C6 OIC criteria given pre-assessed symptom flags — ideal for clinical decision support tools, EHR integrations, or audit workflows where symptom data is already gathered. Prefer this over manual criteria application when consistency and documentation are required. Not suitable for replacing clinician judgment or diagnosing patients directly.
Side effects
- Missing required query parameters returns an error — all eight boolean flags are required
- Passing non-boolean values for flag parameters causes a validation error
- Endpoint is not designed for pediatric patients or IBS — results may be clinically inappropriate if applied outside scope
- Caller must determine and assign all eight flags independently; the API cannot assess patient symptoms directly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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