Harvey-Bradshaw Index Calculator

Harvey-Bradshaw Index for Crohn’s disease clinical activity.

For educational and clinical reference. Not a substitute for medical judgment. See the medical disclaimer.

General well-being

Abdominal pain

Number of liquid/soft stools per day

Abdominal mass

Complication: arthralgia

Complication: uveitis

Complication: erythema nodosum

Complication: aphthous ulcers

Complication: pyoderma gangrenosum

Complication: anal fissure

Complication: new fistula

Complication: abscess

Score

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Interpretation

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References

Harvey RF, Bradshaw JM. A simple index of Crohn’s-disease activity. Lancet. 1980;1(8167):514.

How to use

Select well-being, abdominal pain, daily liquid stools, abdominal mass, and any complications.
The total Harvey-Bradshaw Index and disease-activity band update instantly.
A score < 5 indicates clinical remission.

Frequently asked questions

What is the Harvey-Bradshaw Index?

A simplified clinical activity index for Crohn’s disease using only clinical variables (well-being, pain, stools, abdominal mass, complications) — a practical alternative to the CDAI.

What HBI score means remission?

A score < 5 indicates clinical remission; 5–7 mild, 8–16 moderate, > 16 severe disease activity.

HBI vs CDAI?

The HBI correlates well with the CDAI but needs no diary or labs, so it is faster and more practical for routine clinic use.

What counts as a clinical response?

A decrease of ≥ 3 points from baseline is commonly used to define clinical response in trials.

Last updated June 28, 2026