Zouboulis et al reported the International Hidradenitis Suppurative Severity Score System (IHS4) for patients with hidradenitis suppurative (HS). The authors are from multiple institutions in Europe.
Patient selection: hidradenitis suppurative
Parameters:
(1) number of nodules
(2) number of abscesses
(3) number of fistulae and sinuses (draining tunnels)
IHS4 =
= (number of nodules) + (2 * (number of abscesses)) + (4 * (number of draining tunnels))
Interpretation:
• minimum score: 0
• maximum score: 20 or more
Total Score
HS Severity
<= 3
mild
4 to 10
moderate
>= 11
severe
where:
• A score of 0 is considered inactive disease.
Performance:
• The area under the ROC curve is 0.74.
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