The Severity of Alopecia Tool (SALT) score is a physician administered scale measuring the amount of scalp without any terminal hair assessed by the investigator at Baseline, Week 4, Week 8, Week 12, Week 16, Week 20, and Week 24. Possible scores range from 0 (no scalp hair loss) to 100 (complete scalp hair loss). A negative change in the SALT score over time represents hair regrowth. The primary efficacy variable was the percent change from baseline in SALT score at Week 24. This was calculated as the mean of the changes from Baseline (Visit 2) SALT score to Week 24 (Visit 10) SALT score, divided by Baseline SALT score and expressed as a percentage.

This primary analysis utilized the SALT score with imputation for last observation carried forward (LOCF) and was based on the intent-to-treat population.

The Alopecia Density and Extent (ALODEX) score is a measurement of the amount of scalp with terminal hair loss assessed by the investigator at Baseline, Week 4, Week 8, Week 12, Week 16, Week 20, and Week 24. ALODEX breaks the scalp up into a grid of 1% scalp surface areas and assigns density rating in each area on a 10 point scale of hair loss (0= no hair loss to 10 = complete baldness). Summation of scores from each 1% scalp surface area provides an overall score which may range from 0 (no scalp hair loss) to 100 (complete baldness). A negative change in the ALODEX score over time represents hair regrowth.

Intent-to-treat population using LOCF to address missing data.

The Severity of Alopecia Tool (SALT) score is a physician administered scale measuring the amount of scalp without any terminal hair. Possible scores range from 0 (no scalp hair loss) to 100 (complete scalp hair loss). A negative change in the SALT score over time represents hair regrowth.

Intent-to-treat population using LOCF to address missing data.

The Alopecia Density and Extent (ALODEX) score is a measurement of the amount of scalp with terminal hair loss assessed by the investigator at Baseline, Week 4, Week 8, Week 12, Week 16, Week 20, and Week 24. ALODEX breaks the scalp up into a grid of 1% scalp surface areas and assigns density rating in each area on a 10 point scale of hair loss (0= no hair loss to 10 = complete baldness). Summation of scores from each 1% scalp surface area provides an overall score which may range from 0 (no scalp hair loss) to 100 (complete baldness). A negative change in the ALODEX score over time represents hair regrowth.

Intent-to-treat population using LOCF to address missing data.

A summary of the proportion of subjects in each treatment arm achieving ≥50% hair regrowth compared with baseline using Severity of Alopecia Tool scores at Week 24 is presented.

Intent-to-treat population using LOCF to address missing data.

A summary of the proportion of subjects in each treatment arm achieving ≥50% hair regrowth compared with baseline using Alopecia Density and Extent scores at Week 24 is presented.

Intent-to-treat population using LOCF to address missing data.

The Scalp Patient Reported Outcome for Target Patch assesses the appearance of the subject's target patch (identified by the subject as his or her most bothersome area of scalp hair loss at Baseline) and was completed by subjects at Baseline, Week 4, Week 12, and Week 24. The assessment has a recall period of "right now" and includes a five-point VRS ranging from "Full hair, scalp of the target patch completely covered with hair" to "no hair, scalp of the target patch completely exposed." The instrument produces a score of 1 to 5, with lower scores indicating more hair covering the subject's target patch. A summary of the proportion of subjects with ≥2 point improvement in Subject Target Patch assessment at Week 24 compared to baseline is presented.

Intent-to-treat population using LOCF to address missing data.

The Scalp Patient Reported Outcome for Entire Scalp assesses the appearance of the subject's whole scalp and was completed by subjects at Baseline, Week 4, Week 12, and Week 24. The assessment has a recall period of "right now" and includes a five-point VRS ranging from "Full hair, whole scalp completely covered with hair" to "no hair, whole scalp completely exposed." The instrument produces a score of 1 to 5, with lower scores indicating more hair covering the subject's target patch. A summary of the proportion of subjects with ≥1 point improvement in Subject Entire Scalp assessment at Week 24 compared to baseline is presented.

Intent-to-treat population using LOCF to address missing data.

The Scalp Clinician Reported Outcome for Target Patch provides the investigator's assessment of the appearance of the subject's target patch (identified by the subject as his or her most bothersome area of scalp hair loss at Baseline) and was completed by investigators at Baseline, Week 4, Week 12, and Week 24. The assessment has a recall period of "right now" and includes a five-point VRS ranging from "Full hair, scalp of the target patch completely covered with hair" to "no hair, scalp of the target patch completely exposed." The instrument produces a score of 1 to 5, with lower scores indicating more hair covering the subject's target patch. A summary of the proportion of subjects with ≥2 point improvement in Clinician Target Patch assessment at Week 24 compared to baseline is presented.

Intent-to-treat population using LOCF to address missing data.

The Scalp Clinician Reported Outcome for Entire Scalp assesses the appearance of the subject's whole scalp and was completed by investigators at Baseline, Week 4, Week 12, and Week 24. The assessment has a recall period of "right now" and includes a five-point VRS ranging from "Full hair, whole scalp completely covered with hair" to "no hair, whole scalp completely exposed." The instrument produces a score of 1 to 5, with lower scores indicating more hair covering the subject's target patch. Change status is categorized as 'Better by x points' when the score decreases from baseline by x points, and as 'Worse by x points' when the score increases by x points.

Intent-to-treat population using LOCF to address missing data.

The Physician Global Impression of Severity (PhGIS) is a 5-point descriptive scale completed by investigators at Baseline, Week 4, Week 12, and Week 24 and is used to capture the investigator's assessment of the subject's disease severity at a particular timepoint. Scores of 1 to 5 are assigned to responses Mild to Extremely Severe, respectively. Change status is categorized as 'Better by x points' when the score decreases from baseline by x points, and as 'Worse by x points' when the score increases by x points.

Intent-to-treat population using LOCF to address missing data.

The Subject Global Impression of Severity (SGIS) is a 5-point descriptive scale completed by subjects at Baseline, Week 4, Week 12, and Week 24 and is used to capture the subject's assessment of disease severity at a particular timepoint. Scores of 1 to 5 are assigned to responses Mild to Extremely Severe, respectively. Change status is categorized as 'Better by x points' when the score decreases from baseline by x points, and as 'Worse by x points' when the score increases by x points.

Intent-to-treat population using LOCF to address missing data.

The Alopecia Impact Assessment (AIA) is a 13-item patient reported outcome questionnaire which measures the subject's experience with impacts related to alopecia areata in managing appearance, worry, sadness, loss of confidence, self-consciousness, embarrassment, feeling unattractive, limitation of social activities, limitation of physical activities, unwanted attention, sweat in eyes, debris in eyes, and debris in nose. The AIA was completed by subjects at Baseline, Week 4, Week 12, and Week 24 and has a recall period of "over the past seven days". An 11-point NRS with anchors "0 - Not at all [impact]" and "10 - Extremely [impact]" (e.g., "Not at all bothersome" and "Extremely bothersome"; "Not at all worried" and "Extremely worried") is utilized. The AIA produces single-item (0-10) and mean total (0-10) scores, with higher scores indicating higher levels of impact.

Intent-to-treat population using LOCF to address missing data.

The Subject Global Impression of Treatment Satisfaction (SGITS) is a 7-point descriptive scale completed by subjects at Week 12 and Week 24. Scale response options ranged from "1. Extremely Satisfied" to "7. Extremely Dissatisfied" and are used to capture how satisfied or dissatisfied they are with the study medication treatment received for their alopecia areata.

Intent-to-treat population using LOCF to address missing data.

The 10 question Dermatology Life Quality Index (DLQI) questionnaire was completed by subjects at Baseline, Week 4, Week 12, and Week 24. When completing the questionnaire, subjects were instructed to think of their hair loss in place of "skin problem" and "skin" as referenced in the questionnaire. Possible summary scores could range from 0 to 30 with higher scores indicating a worse outcome.

Intent-to-treat population using LOCF to address missing data.

The Physician Global Impression of Change (PhGIC) is a 7-point descriptive scale completed by investigators at Week 24. Scale response options ranged from "1. Very much improved" to "7. Very much worse" and are used to capture the investigator's overall impression of change for the subject's alopecia during the treatment period.

Intent-to-treat population using LOCF to address missing data.

The Subject Global Impression of Change (SGIC) is a 7-point descriptive scale completed by subjects at Week 24. Scale response options ranged from "1. Very much improved" to "7. Very much worse" and are used to capture the subject's overall impression of change for his/her alopecia during the treatment period.

Intent-to-treat population using LOCF to address missing data.