Trial Outcomes & Findings for A Study to Evaluate the Safety and Efficacy of PF-06650833, PF-06700841, and PF 06826647 in Adults With Hidradenitis Suppurativa (NCT NCT04092452)

Participants were randomized at 60 sites in 3 countries, including Australia (N=6), United States (N=46) and Canada (N=8). A total of 194 participants (67% moderate and 33% severe hidradenitis suppurativa) were screened successfully and were randomized to 4 treatment groups.

A Study to Evaluate the Safety and Efficacy of PF-06650833, PF-06700841, and PF 06826647 in Adults With Hidradenitis Suppurativa

HiSCR response was defined as at least a 50% reduction in total abscess and inflammatory nodule (AN) count relative to baseline, and no increase in abscess count, and no increase in draining fistula count. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

HiSCR response was defined as at least a 50% reduction in total abscess and inflammatory nodule (AN) count relative to baseline, and no increase in abscess count, and no increase in draining fistula count. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

This estimand was intended to provide difference between treated and placebo in percentage of participants with a total AN count of 0 or 1, or 0, 1 or 2, respectively at week 16. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

The analysis of covariance (ANCOVA) model was implemented for statistical testing, which included terms of treatment group, the stratification factors, and the baseline value as the independent variable.

The IHS4 score was calculated by the number of nodules, the number of abscesses, and the number of draining tunnels. IHS4 score = (number of nodules × 1) + (number of abscesses × 2) + {number of draining tunnels (fistulae/sinuses) × 4}. Confidence interval (CI) was calculated using Blyth-Still-Casella method. Lower IHS4 absolute scores mean a better outcome.

The IHS4 score was calculated by the number of nodules, the number of abscesses, and the number of draining tunnels. IHS4 score = (number of nodules × 1) + (number of abscesses × 2) + {number of draining tunnels (fistulae/sinuses) × 4}. Confidence interval (CI) was calculated using Blyth-Still-Casella method. Lower IHS4 absolute scores mean a better outcome.

HS flare was defined as at least a 25% increase in AN count with a minimum increase of 2 relative to Baseline. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

The rate comparing treatment and placebo groups at each visit was analyzed using CMH test with MR weighting strategy between each of active treatment group and placebo. Confidence interval (CI) was calculated using Blyth-Still-Casella method. NRS30 was defined as ≥30% reduction and ≥1 unit reduction from baseline in Patient's Global Assessment (PGA) Skin Pain NRS. The range of skin pain was from 0 to 10. Lower IHS4 absolute scores mean a better outcome. Baseline was defined as the average of all values recorded between Day -6 and Day 1. Weekly data were average values of daily observations over 7 days. NRI (non-responder imputation) for missing values which were related to withdrawal and all other events except for COVID-19.

The rate comparing treatment and placebo groups at each visit was analyzed using CMH test with MR weighting strategy between each of active treatment group and placebo. Confidence interval (CI) was calculated using Blyth-Still-Casella method. NRS30 was defined as ≥30% reduction and ≥1 unit reduction from baseline in Patient's Global Assessment (PGA) Skin Pain NRS. The range of skin pain was from 0 to 10. Lower IHS4 absolute scores mean a better outcome. Baseline was defined as the average of all values recorded between Day -6 and Day 1. Weekly data were average values of daily observations over 7 days. NRI (non-responder imputation) for missing values which were related to withdrawal and all other events except for COVID-19.

Patient Global Assessment Skin Pain Numeric Rating Scale was used to assess the worst skin pain and the average skin pain due to HS. Ratings for the 2 items range from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). These two concepts were measured within the same instrument, but were scored separately. There was no composite score for this endpoint. The higher the score, the worse the outcomes, ranging from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). Subscales were not combined. The ANCOVA model was fitted. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

Patient Global Assessment Skin Pain Numeric Rating Scale was used to assess the worst skin pain and the average skin pain due to HS. Ratings for the 2 items range from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). These two concepts were measured within the same instrument, but were scored separately. There was no composite score for this endpoint. The higher the score, the worse the outcomes, ranging from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). Subscales were not combined. The ANCOVA model was fitted. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

Patient Global Assessment Skin Pain Numeric Rating Scale was used to assess the worst skin pain and the average skin pain due to HS. Ratings for the 2 items range from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). These two concepts were measured within the same instrument, but were scored separately. There was no composite score for this endpoint. The higher the score, the worse the outcomes, ranging from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). Subscales were not combined. The ANCOVA model was fitted. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

Patient Global Assessment Skin Pain Numeric Rating Scale was used to assess the worst skin pain and the average skin pain due to HS. Ratings for the 2 items range from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). These two concepts were measured within the same instrument, but were scored separately. There was no composite score for this endpoint. The higher the score, the worse the outcomes, ranging from 0 (no skin pain) to 10 (skin pain as bad as you can imagine). Subscales were not combined. The ANCOVA model was fitted. Confidence interval (CI) was calculated using Blyth-Still-Casella method.

Erythema response was defined as achieving erythema score of 1 or 0 in all affected anatomic regions among participants who had an erythema score of 2 or more in at least 1 anatomic region at baseline. NRI for missing values which were related to withdrawal and all other events except for COVID-19. A four-point ordinal scale ranging was used: 0 (no redness), 1 (faint but discernible pink coloration), 2 (moderate red coloration), and 3 (very red or bright red coloration).

The treatment-emergent AEs (TEAEs) were considered as an adverse event that started during the effective duration of treatment. All events that started on or after the first dosing day and time/start time, if collected, but before the last dose plus the lag time was flagged as TEAEs.

The treatment-emergent AEs (TEAEs) were considered as an adverse event that started during the effective duration of treatment. All events that started on or after the first dosing day and time/start time, if collected, but before the last dose plus the lag time was flagged as TEAEs.

The vital signs were measured included temperature (Oral, Tympanic, Axillary or Temporal), pulse rate (beats/min) and blood pressure (mmHg).

Laboratory test abnormalities included hematology, chemistry, urinalysis and biomarker.

ECG parameters included QT interval, QTc interval, PR interval, and QRS complex.

The Hidradenitis Suppurativa Symptom Items were 5 single items that assessed patient self-reported symptoms related to HS. The participants were asked to rate each symptom on a 0 to 10 numerical rating scale, with 0 indicating no symptom experience and 10 indicating the worst possible symptom. The symptoms assessed include: pain, tenderness, swelling, tiredness, and bother of lesion appearance. The higher the score, the worse the outcomes, ranging from 0 indicating no symptom experience and 10 indicating the worst possible symptom. These concepts were scored separately, and were not combined into a composite score. When using mixed effect model repeated measurement (MMRM) analysis, only observed data were used and missing data were not imputed.

The Hidradenitis Suppurativa Symptom Items were 5 single items that assessed patient self-reported symptoms related to HS. The participants were asked to rate each symptom on a 0 to 10 numerical rating scale, with 0 indicating no symptom experience and 10 indicating the worst possible symptom. The symptoms assessed include: pain, tenderness, swelling, tiredness, and bother of lesion appearance. The higher the score, the worse the outcomes, ranging from 0 indicating no symptom experience and 10 indicating the worst possible symptom. These concepts were scored separately, and were not combined into a composite score. When using mixed effect model repeated measurement (MMRM) analysis, only observed data were used and missing data were not imputed.

The Dermatology Life Quality Index (DLQI) is a general dermatology questionnaire that consists of 10 items that assess patient health-related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment) over the last week. Scoring for each item is on a qualitative 0 to 3 scale, with options of "Not at all", "A little", "A lot", "Very much". The scores are added up to a total composite score with the range from the minimum score of 0 to the maximum score of 30. The higher the score, the worse the outcomes.

The Dermatology Life Quality Index (DLQI) is a general dermatology questionnaire that consists of 10 items that assess patient health-related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment) over the last week. Scoring for each item is on a qualitative 0 to 3 scale, with options of "Not at all", "A little", "A lot", "Very much". The scores are added up to a total composite score with the range from the minimum score of 0 to the maximum score of 30. The higher the score, the worse the outcomes. The assessments examined a change from baseline in total score, where negative value means improvement in DLQI.

The Dermatology Life Quality Index (DLQI) is a general dermatology questionnaire that consists of 10 items that assess patient health-related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment) over the last week. Scoring for each item is on a qualitative 0 to 3 scale, with options of "Not at all", "A little", "A lot", "Very much". The scores are added up to a total composite score with the range from the minimum score of 0 to the maximum score of 30. The higher the score, the worse the outcomes. The assessments examined the percentage of patients with complete resolution of dermatology specific quality of life impact, as assessed by a total score of ≤ 1 (range: 0 - 30), where higher percentage indicates better improvement in DLQI.

In summary statistics for pharmacokinetic, concentration values below the lower limit of quantification (LLOQ) was set to zero.