Collection of Clinical and Instrumental Data in Adult Subjects Suffering From Atopic Dermatitis

Study Overview
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Brief Summary
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Atopic dermatitis represents a real challenge in public health as it affects a large percentage of children and adults. Affected individuals must cope with a significant psychosocial burden, in addition to dealing with the medical aspects of the disease. The purpose of this exploratory study is to collect clinical severity AD data, using PO-SCORAD (self-assessment by the subjects), SCORAD evolution, instrumental measurements and treatment follow up of subjects. The future objective is to develop a personalised prediction model of AD flares in order to improve management of AD by more accurate severity evaluations by the subject and the physician. Development of a method of early detection of flares will open new treatment pathways for AD management.

Detailed Description
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This study will be conducted as a French monocentric exploratory study in adults with mild to moderate Atopic Dermatitis, and will be conducted on a maximum 25 included subjects. The clinical study will include 4 study visits, after inclusion visit, and the maximum duration of the study for each subject will be 3 months : Day 1, Day 29, Day 57, Day 85. In case of AD flare suspicion, the investigator may recommend a complementary visit. Any complementary visit will be confirmed by investigator according to the subject's information: photographs and PO-SCORAD sent by the subject. If visit is confirmed, it will be scheduled as soon as possible. The objectives are: to collect clinical AD severity data in order to evaluate natural AD evolution with clinical and subject's scales, during a three-month period. to collect non-invasive instrumental AD data on a target area and on adjacent area: cutaneous hydration, epidermal barrier conditions and colorimetric parameters on cutaneous erythema to examine clinical and instrumental AD data to collect illustrative photographs of AD lesions

Official Title
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Collection of Clinical and Biometrological Data in Adult Subjects Suffering From Atopic Dermatitis (AD) During a Three-month Period

Conditions
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Atopic Dermatitis

Intervention / Treatment
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* Other: Clinical evaluations
* Other: Non-invasive instrumental measurements
* Other: Subject's evaluations


Participation Criteria
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Eligibility Criteria
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Only most important inclusion and exclusion criteria are listed : those which are study specific. Inclusion Criteria: Subject suffering from Atopic Dermatitis according to the U.K. Working Party's Diagnostic Criteria for Atopic Dermatitis (3). Subject with mild to moderate Atopic Dermatitis with 20 <= SCORAD <= 40 at inclusion Subject with flare frequency ≥ 4 over the last year Subject with a cutaneous target area, allowing the measurements, located on upper or lower limbs and defined as a usual AD flare area according to the subject Subject owning a smartphone suitable with the 5.0 downloaded version of PO-Scorad® app Subject who agrees to use daily a free mobile app: PO-Scorad® Exclusion Criteria: Subject having received artificial UV exposure or excessive exposure to natural sunlight within the 2 weeks before the inclusion visit or planning to be exposed to excessive or prolonged natural sunlight or UV exposures for the duration of the study Subject with a hirsute target area Systemic immunosuppressive therapy (excepted systemic corticoids) within 3 months before the inclusion visit or ongoing at inclusion visit. Systemic corticoids taken (whatever the number of intake) within 4 weeks before the inclusion visit or ongoing at inclusion visit. Phototherapy performed within 4 weeks before the inclusion visit or ongoing at inclusion visit Systemic antibiotics taken within 7 days before the inclusion visit or ongoing at inclusion visit. Moderate to high-potency topical corticosteroids applied within 7 days on upper or lower limbs before the inclusion visit or ongoing at inclusion visit Topical immunomodulators (TIMs), applied within 7 days on upper or lower limbs before the inclusion visit or ongoing at inclusion visit Any topical treatment or product applied between the evening before the inclusion visit and the inclusion visit Water applied on target area within 4 hours before the inclusion visit

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: All Subjects<br>Clinical and instrumental measurements | Other: Clinical evaluations<br>* SCORAD and target SCORAD<br>Other: Non-invasive instrumental measurements<br>* TEWL, cutaneous hydration, skin lipidic analysis, colorimetry, hydration index<br>Other: Subject's evaluations<br>* PO-SCORAD, target PO-SCORAD and subject's questionnaire<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change on clinical evaluation (investigator evaluation) : SCORAD | The SCORAD is a scoring system based on the assessment of extent and intensity in a standardized manner | Day1, Day29, Day57 and Day85 | 
| Change on clinical evaluation (investigator evaluation) : Target SCORAD | Target SCORAD is the sum of all SCORAD objective signs scores: erythema, oedema/papulation, oozing/crusts, excoriation, lichenification and dryness evaluated on a target area | Day1, Day29, Day57 and Day85 | 
| Change on instrumental measurement performed by investigational team : TEWL | TEWL: Transepidermal water loss. TEWL tracks the passage of water through the skin | Day1, Day29, Day57 and Day85 | 
| Change on instrumental measurement performed by investigational team : Lipidic analysis | The proportion of lipids will be analysed on specific bands of infrared spectra by calculation of area under curve of the peaks | Day1, Day29, Day57 and Day85 | 
| Change on instrumental measurement performed by investigational team : cutaneous hydration | Cutaneous hydration evaluated by humidity of the stratum corneum. The measurement is based on capacitance measurement of the stratum corneum. | Day1, Day29, Day57 and Day85 | 
| Change on instrumental measurement performed by investigational team : colorimetric parameter of cutaneous erythema | Evaluation with objective assessment the color of the surface of the skin. Data output will be in the form of the L* a* b* color coordinate system. The a* values (red/ green) will be assessed for quantifying the degree of erythema. | Day1, Day29, Day57 and Day85 | 
| Change on instrumental measurement by subject | hydration index : mean value measured by a measuring pen on the skin | each day, during 3 months | 
| Change on Subject's evaluations : subject evaluation | PO-SCORAD : a fully validated self-assessment of the AD severity adapted from the SCORAD index; it is available on mobile's phone application. | each day during 3 months | 
| Change on Subject's evaluation : subject evaluation | target PO-SCORAD : The target PO-SCORAD is the sum of all PO-SCORAD objective signs scores: dryness of the skin without eczema, redness of the skin affected by eczema, swelling, oozing/ crust, scratching and thickening evaluated on the target area | on Day1, Day29, Day57 and Day85 | 
| Change on Subject's evaluation : subject evaluation | Subject's questionnaire on lifestyle modifications, as potential flare triggers. | once a month |