Global Healthcare Study on Hidradenitis Suppurativa (GHSHS)

June 15, 2026 updated by: Julia Tatjana Maul
The Global Healthcare Study on Hidradenitis Suppurativa (GHSHS) is an international, multicenter observational study hosted by the University of Zurich (UZH) investigating healthcare access, treatment patterns, disease severity, and quality of life in patients with psoriasis. The study collects standardized clinical data from routine medical records to identify disparities in healthcare delivery and outcomes across different healthcare systems.

Study Overview

Status

Recruiting

Conditions

Detailed Description

The study employs a combined retrospective and prospective design, collecting data from routine clinical care and medical records spanning from January 2020 through the study conclusion.

Study Type

Observational

Enrollment (Estimated)

9600

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patient populations across world regions seen for hidradenitis suppurativa.

Description

Inclusion Criteria:

  • Signed General Consent Form, or equivalent document
  • Confirmed diagnosis of Hidradenitis Suppurativa

Exclusion Criteria:

  • Inability to provide informed consent.
  • Datasets with ambiguous or unclear diagnosis.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
International Hidradenitis Suppurativa Severity Score System (IHS4)
Time Frame: Baseline and follow-up visits every 6-12 months for up to 5 years.
Clinician-assessed measure of hidradenitis suppurativa severity based on the number of inflammatory nodules, abscesses, and draining tunnels; higher scores indicate more severe disease.
Baseline and follow-up visits every 6-12 months for up to 5 years.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Dermatology Life Quality Index (DLQI)
Time Frame: Baseline and follow-up visits every 6-12 months for up to 5 years.
Patient-reported measure of dermatology-specific quality of life; total score ranges from 0 to 30, with higher scores indicating greater impairment.
Baseline and follow-up visits every 6-12 months for up to 5 years.
Hurley Staging System
Time Frame: Baseline and follow-up visits every 6-12 months for up to 5 years.
Clinician-assessed classification of hidradenitis suppurativa severity categorized as Stage I, Stage II, or Stage III.
Baseline and follow-up visits every 6-12 months for up to 5 years.
Sartorius Hidradenitis Suppurativa Severity Score (HSS)
Time Frame: Baseline and follow-up visits every 6-12 months for up to 5 years.
Clinician-assessed measure of hidradenitis suppurativa severity incorporating lesion counts and anatomical involvement; higher scores indicate more severe disease.
Baseline and follow-up visits every 6-12 months for up to 5 years.
Physician Global Assessment (PGA)
Time Frame: Baseline and follow-up visits every 6-12 months for up to 5 years.
Clinician-assessed global measure of hidradenitis suppurativa severity on a scale from 0 to 4, with higher scores indicating more severe disease.
Baseline and follow-up visits every 6-12 months for up to 5 years.
Patient-reported Numerical Rating Scale (NRS) for severity of hidradenitis suppurativa
Time Frame: Baseline and follow-up visits every 6-12 months for up to 5 years.
Patient-reported assessment of overall hidradenitis suppurativa severity on a numerical rating scale from 0 (no disease) to 10 (most severe disease imaginable).
Baseline and follow-up visits every 6-12 months for up to 5 years.
Patient-reported Numerical Rating Scale (NRS) for pain related to hidradenitis suppurativa
Time Frame: Baseline and follow-up visits every 6-12 months for up to 5 years.
Patient-reported assessment of hidradenitis suppurativa-related pain on a numerical rating scale from 0 (no pain) to 10 (worst imaginable pain).
Baseline and follow-up visits every 6-12 months for up to 5 years.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Julia Tatjana Maul

Collaborators

University of Zurich
University Hospital, Zürich

Investigators

  • Principal Investigator: Julia-Tatjana Maul, Prof. Dr. med., University of Zurich

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2025

Primary Completion (Estimated)

December 31, 2029

Study Completion (Estimated)

December 31, 2029

Study Registration Dates

First Submitted

June 15, 2026

First Submitted That Met QC Criteria

June 15, 2026

First Posted (Actual)

June 22, 2026

Study Record Updates

Last Update Posted (Actual)

June 22, 2026

Last Update Submitted That Met QC Criteria

June 15, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2024-01704-3

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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