The ACQ is a validated instrument used in clinical research and practice to evaluate asthma control/impairment.

The ACQ assesses disease control by evaluating 7 questions: night time awakenings, asthma symptoms upon wakening, activity limitation, shortness of breath, wheeze frequency, short-acting bronchodilator use, and FEV1. All seven items are scored on a 7-point scale, with 0 indicating good control and 6 indicating poor control; the total score is the mean of the seven items and ranges from 0 (totally-controlled) to 6 (extremely poorly controlled). A negative change from baseline indicates improvement. A change of 0.50 points is considered clinically meaningful and a total score of < 1.0 indicates good asthma control.

Full analysis set with available data

The asthma exacerbation event rate is defined as the number of events per subject-year during the 24 week treatment period. An asthma exacerbation was defined as an asthma worsening that requires systemic corticosteroids for at least 3 days during the study; distinct asthma exacerbations were defined as events with start dates more than 10 days apart from each other.

Full analysis set with available data

The ACQ is a validated instrument used in clinical research and practice to evaluate asthma control/impairment.

The ACQ assesses disease control by evaluating 7 questions: night time awakenings, asthma symptoms upon wakening, activity limitation, shortness of breath, wheeze frequency, short-acting bronchodilator use, and FEV1. All seven items are scored on a 7-point scale, with 0 indicating good control and 6 indicating poor control; the total score is the mean of the seven items and ranges from 0 (totally-controlled) to 6 (extremely poorly controlled). A negative change from baseline indicates improvement. A change of 0.50 points is considered clinically meaningful and a total score of < 1.0 indicates good asthma control.

Full analysis set participants who were taking both inhaled corticosteroids (ICS) and a long-acting β-agonist (LABA) at baseline with available data.

The asthma exacerbation event rate is defined as the number of events per subject-year during the 24 week treatment period. An asthma exacerbation was defined as an asthma worsening that requires systemic corticosteroids for at least 3 days during the study; distinct asthma exacerbations were defined as events with start dates more than 10 days apart from each other.

Full analysis set participants taking both ICS and LABA at baseline with available data

The Asthma Symptom Diary (ASD) consists of 23 questions answered on a handheld device, including 10 asthma symptom-related items (5 answered in the morning and 5 in the evening).

The morning diary comprises questions on 4 asthma-related symptoms (wheezing, shortness of breath, cough, chest tightness), rated on a 5-point severity scale from 0 (no symptom) to 4 (very severe symptoms), and 1 question on nocturnal awakenings, rated from 0 (did not wake up) to 4 (unable to sleep due to asthma). The evening diary has questions on the same 4 asthma-related symptoms and 1 question on limitations of activities, rated from 0 (not at all) to 4 (extremely).

The ASD daily score is computed by averaging the responses to the 10 symptom-related items, and the mean 7-day ASD score is calculated by averaging the 7 daily scores, with the final score ranging from 0 (minimal symptoms) to 4 (very severe symptoms).

Full analysis set with available data

Full analysis set with available data

Participants were permitted allowed to use their inhaled rescue medication (SABA) as needed throughout the study and the use was captured in the daily electronic diary (eDiary).

Full analysis set with available data

An asthma exacerbation is defined as an asthma worsening that requires systemic corticosteroids for at least 3 days during the study. Median time to first asthma exacerbation could not be estimated, the percentage of participants with an asthma exacerbation is reported.

Full analysis set with available data

An asthma exacerbation is defined as an asthma worsening that requires systemic corticosteroids for at least 3 days during the study.

Full analysis set with available data

The AQLQ is an asthma-specific instrument that includes evaluations of both symptoms and health-related quality of life measures. The 32-item instrument measures 4 domains affected by asthma including activity limitations, emotional function, exposure to environmental stimuli, and symptoms.

Participants were asked to recall their experiences during the last 2 weeks and to respond to each question on a 7-point scale (7=no impairment, 1=severe impairment). The overall score was calculated as mean of the responses to the 32 questions and ranges from 1 (severe impairment) to 7 (no impairment). A positive change from baseline indicates improvement.

Full analysis set with available data

Peak expiratory flow rate was measured by the participant twice daily at approximately the same time each day (eg, within 1 hour of waking and immediately before bedtime) using a peak flow meter.

Full analysis set with available data

Peak flow was measured by the participant twice daily at approximately the same time each day (eg, within 1 hour of waking and immediately before bedtime) using a peak flow meter. The variation of peak flow is defined as the absolute value of the difference between the A.M. and P.M. peak flow in one day for an individual participant.

Full analysis set with available data

Asthma symptom-free days is defined as days that a participant had a score of zero in their daily asthma symptom diary score.

The ASD consists of 23 questions answered on a handheld device, including 10 asthma symptom-related items (5 answered in the morning and 5 in the evening).

The morning diary comprises questions on 4 asthma-related symptoms (wheezing, shortness of breath, cough, chest tightness), rated on a 5-point severity scale from 0 (no symptom) to 4 (very severe symptoms), and 1 question on nocturnal awakenings, rated from 0 (did not wake up) to 4 (unable to sleep due to asthma). The evening diary has questions on the same 4 asthma-related symptoms and 1 question on limitations of activities, rated from 0 (not at all) to 4 (extremely).

The daily score is the average of the responses to the 10 items.

Full analysis set with available data during each 4-week interval

Serum brodalumab concentrations were measured using an enzyme-linked immunosorbent assay (ELISA). The lower limit of quantification (LLOQ) = 0.0500 µg/mL; values below the LLOQ were set to zero.

Participants who received brodalumab with available concentration data at each time point.

Adverse events were graded for severity according to the Common Terminology Criteria for Adverse Events (CTCAE) version 4.

The investigator assessed whether the adverse event was possibly related to the investigational product.

A serious adverse event is defined as an adverse event that meets at least 1 of the following serious criteria:

• fatal;
• life threatening;
• requires in-patient hospitalization or prolongation of existing hospitalization;
• results in persistent or significant disability/incapacity;
• congenital anomaly/birth defect;
• other medically important serious event.

Randomized participants who received at least 1 dose of study drug.