Study of Adalimumab in Subjects With Moderate to Severe Chronic Hidradenitis Suppurativa

• Percentage of Participants Achieving Clinical Response at Week 16 [ Time Frame: Baseline, Week 16 ] [ Designated as safety issue: No ]
  Clinical response is defined as a Physician's Global Assessment (PGA) of clear, minimal, or mild (scores of 0, 1, or 2) with a minimum of 2 grades improvement (reduction) from baseline. PGA is a physician's assessment of the severity of disease based on a 6-point scale (score of 0 = clear and 5 = very severe).
  
  

• Percent Change From Baseline in Number of All Inflammatory Nodules and Plaques at Week 16 [ Time Frame: Baseline, Week 16 ] [ Designated as safety issue: No ]
  Includes inflammatory nodules that are tender, erythematous, and have diameters less than 5 cm and includes plaques that have diameters greater than or equal to 5 cm. Range for percent change is negative infinity to infinity. Negative percent changes from Baseline indicate improvement.
  
  
• Percentage of Participants Achieving Clinical Response at Week 2 [ Time Frame: Baseline, Week 2 ] [ Designated as safety issue: No ]
  Clinical response is defined as a Physician's Global Assessment (PGA) of clear, minimal, or mild (scores of 0, 1, or 2) with a minimum of 2 grades improvement (reduction) from baseline. PGA is a physician's assessment of the severity of disease based on a 6-point scale (score of 0 = clear and 5 = very severe).
  
  
• Percentage of Participants Achieving Clinical Response at Week 4 [ Time Frame: Baseline, Week 4 ] [ Designated as safety issue: No ]
  Clinical response is defined as a Physician's Global Assessment (PGA) of clear, minimal, or mild (scores of 0, 1, or 2) with a minimum of 2 grades improvement (reduction) from baseline. PGA is a physician's assessment of the severity of disease based on a 6-point scale (score of 0 = clear and 5 = very severe).
  
  
• Percentage of Participants Achieving Clinical Response at Week 8 [ Time Frame: Baseline, Week 8 ] [ Designated as safety issue: No ]
  Clinical response is defined as a Physician's Global Assessment (PGA) of clear, minimal, or mild (scores of 0, 1, or 2) with a minimum of 2 grades improvement (reduction) from baseline. PGA is a physician's assessment of the severity of disease based on a 6-point scale (score of 0 = clear and 5 = very severe).
  
  
• Percentage of Participants Achieving Clinical Response at Week 12 [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
  Clinical response is defined as a Physician's Global Assessment (PGA) of clear, minimal, or mild (scores of 0, 1, or 2) with a minimum of 2 grades improvement (reduction) from baseline. PGA is a physician's assessment of the severity of disease based on a 6-point scale (score of 0 = clear and 5 = very severe).
  
  
• Change From Baseline in Modified Sartorius Scale at Week 16 [ Time Frame: Baseline, Week 16 ] [ Designated as safety issue: No ]
  The Modified Sartorius Scale reflects changes in hidradenitis suppurative symptoms, namely the number of lesions (abscesses, nodules, and fistulas) and the longest distance between lesions. A total score is derived based on assessments at up to 8 distinct anatomical regions and ranges from 5 to indefinite. Smaller numbers are better scores and indicate less lesion involvement, thus decreases (negative changes) from baseline indicate improvement in severity of disease.
  
  
• Change From Baseline in Modified Sartorius Scale at Week 52 [ Time Frame: Baseline, Week 52 ] [ Designated as safety issue: No ]
  The Modified Sartorius Scale reflects changes in hidradenitis suppurative symptoms, namely the number of lesions (abscesses, nodules, and fistulas) and the longest distance between lesions. A total score is derived based on assessments at up to 8 distinct anatomical regions and ranges from 5 to indefinite. Smaller numbers are better scores and indicate less lesion involvement, thus decreases (negative changes) from baseline indicate improvement in severity of disease.
  
  
• Percent Change From Baseline in Number of All Inflammatory Nodules and Plaques at Week 52 [ Time Frame: Baseline, Week 52 ] [ Designated as safety issue: No ]
  Includes inflammatory nodules that are tender, erythematous, and have diameters less than 5 cm and includes plaques that have diameters greater than or equal to 5 cm. Range for percent change is negative infinity to infinity. Negative percent changes from Baseline indicate improvement.
  
  

This Phase 2 randomized, double-blind, placebo-controlled multicenter study consists of 2 treatment periods: a 16-week double-blind, placebo-controlled period (Period 1: Weeks 0 through the end of Week 15) followed by a 36-week open-label period (Period 2: Weeks 16 through 52). Participants are randomized in a 1:1:1 ratio based on Hurley Stage as stratification factor to receive adalimumab 40 mg every week (qwk), adalimumab 40 mg every other week (eow), or matching placebo during Period 1. During Period 2, participants receive open-label adalimumab 40 mg eow with the option to escalate to 40 mg weekly dosing at Week 28 or Week 31 if the participant has a Physician's Global Assessment of moderate disease or worse (score of greater than or equal to 3). The primary objective of the study is to determine the clinical efficacy and safety of participants with moderate to severe chronic hidradenitis suppurativa (HS) after 16 weeks of treatment. The secondary objective is to evaluate the maintenance of efficacy and continued safety of adalimumab for an additional 36 weeks of treatment. (Note: Hurley Stage is a classification system for skin involvement that is largely based on the presence and extent of abscess formation accompanied by scarring and sinus tracts. Hurley Stages are I [abscess formation without scarring and sinus tracts], II [widely separated recurrent abscesses with scarring and sinus tracts], and III [multiple interconnected abscesses and sinus tracts across entire area]. Randomization in this study was performed using stratification by Hurley Stage [III versus (I or II).) At the present time, Period 1 double-blind data only is provided; additional information will be provided when analysis of open-label Period 2 is completed.