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Ho 2004 IV-Steroid Day-3 Score for Severe UC (Ho Index)
x402
Ho 2004 IV-Steroid Day-3 Score for Severe UC (Ho Index) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Computes the Ho 2004 day-3 intravenous steroid failure score (0–9) for severe ulcerative colitis and returns the predicted colectomy risk tier.
Price / call$0.005
Success—
StatusUnknown
How this service works
Ho 2004 day-3 IV-steroid score for severe UC (0–9): mean stools (<4 → 0; 4 ≤ x < 6 → 1; 6 ≤ x ≤ 9 → 2; x > 9 → 4), caller-assigned colonic dilatation (+4), albumin <30 g/L (+1; 30 is not low). Failure: 0–1 → 11%, 2–3 → 43%, ≥4 → 85% (ROC ≥4). Not Travis, not Truelove and Witts, not a colectomy order. magent does not count stools, read films, or measure albumin.
Output
Returns the Ho 2004 total integer score (0–9), the contributing component scores (stool frequency points, colonic dilatation points, albumin points), and the associated colectomy/steroid-failure risk tier: score 0–1 → ~11% failure risk, 2–3 → ~43%, ≥4 → ~85%. The ROC-derived high-risk threshold is ≥4.
Example use cases
Day-3 steroid failure risk stratification
“My IBD patient with severe UC is on day 3 of IV steroids — their mean stool frequency over those 3 days is 8, albumin came back at 26 g/L, and there's no colonic dilatation on imaging. What does the Ho index say about their risk of failing steroids?”
High-risk patient with colonic dilatation
“Severe UC patient, day 3 of IV steroids: mean stool frequency is 10, we're seeing colonic dilatation on the plain film, and albumin is 22 g/L. Run the Ho 2004 score so I know which risk tier they fall into.”
Low stool frequency borderline assessment
“Can you compute the Ho index for a severe UC patient with a mean stool frequency of 5 over the first 3 days of IV steroids, no colonic dilatation, and albumin of 35 g/L? I want to see the score and the predicted failure probability.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/ho_indexWhen to prefer
Use this endpoint when you need to compute the Ho 2004 day-3 IV steroid severity score specifically — not the Travis criteria, not Truelove and Witts, and not any colectomy ordering system. Ideal when a clinical agent has already collected mean stool frequency over days 1–3 of IV steroid therapy and a colonic dilatation assessment, and optionally a serum albumin, and needs a validated numeric risk tier to support gastroenterology decision-making in severe UC.
Side effects
- Missing required parameters (mean_stool_frequency or colonic_dilatation) returns a validation error
- Providing both albumin_g_l and albumin_g_dl simultaneously is rejected
- mean_stool_frequency outside range 0–40 may be rejected
- albumin_g_l outside range 10–60 or albumin_g_dl outside 1–6 may be rejected
- Network or payment (x402) failure returns no score
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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