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

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

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

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
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

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

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

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
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

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
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

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Julia Tatjana Maul

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
University of Zurich
University Hospital, Zürich

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • 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)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2029

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2029

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 15, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 15, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 22, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 22, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 15, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant 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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