Participants underwent esophagogastroduodenoscopy (EGD) with biopsy (2 biopsies each at proximal and distal esophageal locations, plus any inflamed or abnormal areas) per standard clinical practice for the determination of esophageal eosinophils.

ITT population: all randomized participants who received any amount of study drug.

The investigator completed the Physician's EE Global Assessment based upon the participant's reporting of symptoms, weight, dietary status, and overall well-being. The assessment rated severity on a five-point scale (0=none to 4=very severe), taking into account physical findings, vital signs, the Subject's Predominant EE Symptom Assessment, the subject's diary data, and dietary questions. The Subject's Predominant EE Symptom was the EE symptom (vomiting/regurgitation, abdominal/chest pain, or dysphagia) that had the greatest negative impact on the subject based on patient diary data as of the baseline visit.

The full range for change from baseline values is -4 (very severe at baseline, none at end of study) to 4 (none at baseline, severe at end of study). Negative change from baseline scores in the Physician's EE Global Assessment indicate improvement in EE status.

ITT population: all randomized participants who received any amount of study drug with both a baseline and an End of Treatment assessment.

Participants rated the severity of each EE symptom (vomiting/regurgitation, abdominal/chest pain, and dysphagia) based on the previous week's daily diary as none (=0), mild, moderate, severe, or very severe (=4). The predominant symptom was selected at the baseline visit and remained the same throughout the trial. The predominant symptom was defined as the EE symptom that had the greatest negative impact on the participant. The full range for change from baseline values is -4 (very severe at baseline, none at end of study) to 4 (none at baseline, severe at end of study). Negative change from baseline scores in the Patient's EE Predominant Symptom Assessment indicate improvement in the selected symptom.

ITT population: all randomized participants who received any amount of study drug with both a baseline and an End of Treatment assessment.

CHQ is a quality-of-life (QoL), observer-rated (the parent in this study) instrument designed to assess the general health and well-being of pediatric subjects aged 5 to 18 years. The instrument comprises 50 items that cover 14 unique physical and psychological concepts. Each item was scored separately following different scales and timeframes for response. Proprietary scoring algorithms are used. This outcome reports the two CHQ Summary Scores (Physical Summary Score and the Psychosocial Summary Scores) which are indexed to a 0 (poorest quality of life) to 100 (best quality of life) scores. The two summary scores are subsequently combined (via proprietary algorithm) to create the Global Health Summary Score (also on a 0-100 scale). Percent change from baseline values range from 100% (poorest QoL at baseline, best QoL at end of treatment) to -100% (best QoL at baseline, poorest QoL at end of treatment). Higher percent change from baseline values indicate improved QoL.

ITT population: all randomized participants who received any amount of study drug with both a baseline and an End of Treatment assessment; n=number of participants with a response in the given category.