To Assess the Efficacy and Safety of INCB054707 in Participants With Hidradenitis Suppurativa

Change from Baseline was calculated as the post-Baseline value minus the Baseline value. The mixed model repeated measure (MMRM) included the fixed effects of treatment group (placebo and INCB054707 15, 45, and 75 mg), stratification factors (disease severity [Hurley Stage I, II, and III] and geographical region [North America and outside of North America]), visit (Weeks 2, 4, 6, 8, 12, and 16), treatment by visit interaction, and covariates of Baseline measurement and Baseline measurement by visit interaction. The variance-covariance matrix of the within-participant errors in MMRM are modeled as unstructured.

HiSCR, the key secondary endpoint, was defined as at least a 50% decrease from Baseline in AN count with no increase in the number of abscesses or draining fistulas.

HiSCR was defined as at least a 50% decrease from Baseline in AN count with no increase in the number of abscesses or draining fistulas.

HiSCR75 was defined as at least a 75% decrease from Baseline in AN count with no increase in the number of abscesses or draining fistulas.

Change from Baseline was calculated as the post-Baseline value minus the Baseline value. The IHS4 is a composite, dynamic score and validated tool used to determine Hidradenitis Suppurativa severity. It employs a weighted scale using the number of inflammatory nodules, the number of abscesses, and the number of draining tunnels (fistulas or sinuses), with respective weight factors of 1, 2, and 4. Scores: mild=0-3; moderate=4-10; severe ≥11. MMRM included the fixed effects of treatment group (placebo and INCB054707 15, 45, and 75 mg), stratification factors (disease severity [Hurley Stage I, II, and III] and geographical region [North America and outside of North America]), visit (Weeks 2, 4, 6, 8, 12, and 16), treatment by visit interaction, and covariates of Baseline measurement and Baseline measurement by visit interaction. The variance-covariance matrix of the within-participant errors in MMRM are modeled as unstructured.

AN50, AN75, AN90, and AN100 were defined as at least a 50%, 75%, 90%, and 100% decrease, respectively, from Baseline in AN count.

Change from Baseline was calculated as the post-Baseline value minus the Baseline value. MMRM included the fixed effects of treatment group (placebo and INCB054707 15, 45, and 75 mg), stratification factors (disease severity [Hurley Stage I, II, and III] and geographical region [North America and outside of North America]), visit (Weeks 2, 4, 6, 8, 12, and 16), treatment by visit interaction, and covariates of Baseline measurement and Baseline measurement by visit interaction. The variance-covariance matrix of the within-participant errors in MMRM are modeled as unstructured.

Total AN count was assessed throughout the study.

Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

Change from Baseline was calculated as the post-Baseline value minus the Baseline value. MMRM included the fixed effects of treatment group (placebo and INCB054707 15, 45, and 75 mg), stratification factors (disease severity [Hurley Stage I, II, and III] and geographical region [North America and outside of North America]), visit (Weeks 2, 4, 6, 8, 12, and 16), treatment by visit interaction, and covariates of Baseline measurement and Baseline measurement by visit interaction. The variance-covariance matrix of the within-participant errors in MMRM are modeled as unstructured.

An adverse event (AE) was defined as any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug-related. An AE could have been any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatment. A TEAE was defined as any AE either reported for the first time or the worsening of a pre-existing event after the first dose of study drug until the end of the safety follow-up.