LANDSCAPE: Demographics and Treatment Patterns of Patients With Immune-Mediated Inflammatory Skin Diseases in Italian Clinical Practice

LANDSCAPE - Demographic Characteristics and Treatment Profiles of Patients Affected by Inflammatory Skin Diseases (Psoriasis, Atopic Dermatitis, Alopecia Areata, Vitiligo, Hidradenitis Suppurativa) in Italian Clinical Practice

This multicenter retrospective observational registry study will collect existing clinical data from Italian centers to describe epidemiology, treatment patterns, clinical evolution, safety, and comorbidities in patients aged 12 years and older with psoriasis, atopic dermatitis, vitiligo, alopecia areata, or hidradenitis suppurativa.

LANDSCAPE is a non-interventional, multicenter, retrospective disease registry based on routinely collected clinical data (electronic health records and available medical documentation) from participating Italian centers. Data will cover the period January 2016 to December 2025. The registry will support real-world evaluation of treatment patterns, effectiveness and safety outcomes, disease severity scores, persistence/switching, and associated comorbidities across psoriasis, atopic dermatitis, vitiligo, alopecia areata, and hidradenitis suppurativa. Data will be pseudonymized prior to entry into the EDC system. Patients who exercise the opt-out right will not be included.

Inclusion Criteria:

1. Documented diagnosis of psoriasis, atopic dermatitis, vitiligo, alopecia areata, or hidradenitis suppurativa.
2. Age 12 years or older at the first recorded visit.
3. Eligible for or treated with systemic therapies.
4. At least one documented visit during January 2016 to December 2025.
5. No opt-out exercised.

Exclusion Criteria:

1. Opt-out exercised.
2. Medical records with insufficient data.