Effectiveness of a Digital Health Application for Psoriasis

This clinical trial with 348 patients with psoriasis aims to investigate the effectiveness of a self-guided online program for patients with psoriasis. Patients will be randomized and allocated in a 1:1 ratio to either an intervention group, in which they will receive 12-month-access to an online program for psoriasis in addition to treatment as usual (TAU, n = 174), or to a control group, in which they will receive only TAU (n = 174). TAU is defined as any therapy prescribed or recommended by the GP or specialists (e.g. dermatologist, psychiatrist), which may include topical therapy, phototherapy, pharmacotherapy, psychosocial therapy, etc.

Inclusion Criteria: * Age ≥ 18 years * Presence of psoriasis vulgaris or psoriatic arthritis * Submission of a specialist medical certificate attesting to the presence of at least one of the following ICD-10-GM diagnoses: Psoriasis vulgaris (L 40.0, L 40.7), Psoriatic arthritis (L40.5, M07.x) * Impaired health-related quality of life (DLQI \> 10) * Consent to participate * Sufficient understanding of the German language Exclusion Criteria: * Presence of another subtype of psoriasis (pustular psoriasis, guttate psoriasis, inverse psoriasis, erythrodermic psoriasis, or drug-induced psoriasis) or psoriatic arthritis without skin involvement * Presence of malignancies * Presence of other chronic diseases with strong negative influence on quality of life * Currently undergoing psychiatric treatment / current presence of a severe psychiatric diagnosis * Insufficient language and/or IT skills