Systemic Treatment of Moderate-to-severe Psoriasis in Adults: Update of the French Guidelines

Study Purpose

French guidelines on the use of systemic treatments for moderate-to-severe psoriasis in adults have been developed by the psoriasis research group of the French Society of Dermatology using literature available until July 2017 (Amatore et al, 2019). Because several systemic treatments have been marketed since then, new guidelines are mandatory. The aim of this study coordinated by the Centre of Evidence of the French Society of Dermatology is to update the available French guidelines using a Delphi method.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

No
Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.


An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.


Searching Both is inclusive of interventional and observational studies.

Observational
Eligible Ages 18 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion criteria.

  • - French dermatologists.
  • - public and private practice practitioners.
  • - members of the French Society of Dermatology.
- expertise in the field of psoriasis

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.

NCT05144165
Phase

Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Centre of Evidence of the French Society of Dermatology
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

N/A
Principal Investigator Affiliation N/A
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Other
Overall Status Recruiting
Countries France
Conditions

The disease, disorder, syndrome, illness, or injury that is being studied.

Psoriasis, Psoriasis Palmaris, Psoriasis Inverse, Psoriasis Vulgaris, Psoriatic Nail, Psoriatic Plaque, Psoriasis Guttate, Psoriasis of Scalp, Psoriasis Universalis, Psoriatic Erythroderma, Psoriasis Pustular
Study Website: View Trial Website
Additional Details

Justification of Delphi methodology. The Delphi method has been widely used for elaboration of guidelines. The goal of the Delphi method is to solicit group opinion and to combine the opinion of a panel of experts into a consensus (or dissensus). During a Delphi study, multiple rounds of questionnaires are sent to a panel of experts with feedback between rounds, allowing experts to re-evaluate their responses along with the replies of other experts. Design, expert eligibility and data collection A steering committee of members of the French Centre of Evidence (G. Chaby, F. Corgibet, L. Fardet, S. Leducq, F. Poizeau https://reco.sfdermato.org/fr/centre-de-preuves-en-dermatologie) and members of the Psoriasis Research Group of the French Society of Dermatology (M. Chastagner, L. Gouillon), without any competing interest regarding this topic, will be in charge with elaboration and conduction of the Delphi study. The selected experts will be asked whether they agree to participate in the Delphi survey. Upon acceptance, they will be asked to answer the Delphi study administered using the online survey Welphi®. Before the first round, demographic information (age, sex, location of practice, availability of a phototherapy cabin, public or private practice) and competing interests will be collected. All experts will provide informed consent. Experts will have 2 weeks to complete the online survey with two email reminders. For each round, the number of experts who completed the surveys will be documented. Procedure. Definition of consensus For statements with responses on an ordinal 7-point Likert scale (rating 1, strongly disagree to 7 strongly agree), 'agreement' will be defined as a score of 5-7, 'neutral' by a score of 4 and 'disagreement' by a score of 1-3. Consensus will be defined as achieved when > 70% experts will vote for a given option on the Likert scale. For Multiple Choice Questions (MCQs), consensus will be defined as achieved if > 70% experts voted for a particular option. Median and interquartile range (IQR) will be used to describe the central tendency and dispersion of responses: a "strong statement" will be defined as a median score of ≥ 6 or ≤ 2 on the Likert scale and 90% votes for MCQs. If consensus is not reached for one question (using Likert scale or MCQ) after 3 rounds, dissensus is acted. For this study, four rounds are planned, including round 1 with open-ended questions (see below) and a maximum of three rounds to obtain consensus.

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International Sites

Center of Evidence of Dermatology, Paris, France

Status

Recruiting

Address

Center of Evidence of Dermatology

Paris, , 75009

Site Contact

Olivier Chosidow, MD, PhD

olivier.chosidow@aphp.fr

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