Psoriasis (PsO) is a chronic disease characterized by marked inflammation of the skin that results in thick, red, scaly plaques. This study will assess how safe and effective risankizumab is compared to apremilast in adult participants with moderate plaque psoriasis. Adverse events and change in disease symptoms will be monitored.

Risankizumab (Skyrizi) and apremilast are approved drugs for the treatment of moderate to severe PsO. Approximately 330 participants with moderate plaque psoriasis (PsO) will be enrolled across approximately 55 sites globally.

The study has 2 periods : Period A from Baseline to Week 16, and Period B, from Week 16 to Week 52. In Period A, participants will be randomly placed into 2 groups to receive either subcutaneous risankizumab or oral apremilast for 16 weeks. In Period B, participants who received apremilast in Period A will again be randomly assigned to 1 of the 2 groups to receive either risankizumab or apremilast for 36 weeks. At weeks 28 and 40, participants considered non-responders to apremilast based on their psoriasis score will be offered to receive risankizumab.

There may be a higher burden for participants in this study compared to usual standard of care. Participants will attend regular visits per routine clinical practice. The effect of the treatment will be checked by medical assessments, checking for side effects, and questionnaires.

Inclusion Criteria:

- Candidates for systemic therapy with moderate chronic plaque psoriasis (PsO) (with or without psoriatic arthritis) at Screening and Baseline for at least 6 months prior to Baseline defined as:

• Body Surface Area (BSA) >= 10% and <= 15%; and
• Psoriasis Area and Severity Index (PASI) >= 12; and
• Static Physician Global Assessment (sPGA) = 3 (moderate) based on a 5-point scale (0 to 4).

Exclusion Criteria:

• Participant has any form of PsO other than chronic plaque PsO (e.g., pustular PsO, palmoplantar pustulosis, acrodermatitis of Hallopeau, erythrodermic, or guttate PsO).
• History of current drug-induced PsO or a drug-induced exacerbation of pre-existing psoriasis.
• History of active ongoing inflammatory skin diseases other than PsO and psoriatic arthritis that could interfere with the assessment of PsO (e.g., hyperkeratotic eczema).
• Prior exposure to risankizumab or apremilast.

AbbVie is committed to responsible data sharing regarding the clinical trials we sponsor. This includes access to anonymized, individual and trial-level data (analysis data sets), as well as other information (e.g., protocols, analyses plans, clinical study reports), as long as the trials are not part of an ongoing or planned regulatory submission. This includes requests for clinical trial data for unlicensed products and indications.

For details on when studies are available for sharing visit https://vivli.org/ourmember/abbvie/

Access to this clinical trial data can be requested by any qualified researchers who engage in rigorous independent scientific research, and will be provided following review and approval of a research proposal and statistical analysis plan and execution of a data sharing statement. Data requests can be submitted at any time after approval in the US and/or EU and a primary manuscript is accepted for publication. For more information on the process, or to submit a request, visit the following link https://www.abbvieclinicaltrials.com/hcp/data-sharing/