Reslizumab

An AE was defined as any adverse experience, including side effect, injury, toxicity, sensitivity reaction, intercurrent illness, or sudden death, whether or not it was considered related to the use of study drug. Treatment emergent adverse events were those that started any time after the administration of the first dose of study drug (at baseline of this study) and before the cessation of study drug. Serious adverse events that occurred any time after the administration of the first dose of study drug until 30 days after administration of the last dose of study drug were reported as treatment emergent serious adverse events.

Hematology laboratory tests performed include: hemoglobin, hematocrit, red blood cell count, mean cell volume, mean cell hemoglobin, mean cell hemoglobin concentration, platelet count, white blood cell count, and differential count and percentage (polymorphonuclear leukocytes \[neutrophils\], lymphocytes, eosinophils, monocytes, basophils, platelets).

Serum chemistry laboratory tests performed include: calcium, phosphorus, magnesium, sodium, potassium, chloride, creatinine, glucose \[nonfasting\], blood urea nitrogen, total cholesterol, uric acid, alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, gamma glutamyl transpeptidase, alkaline phosphatase, bicarbonate, creatine kinase, total protein, albumin, total bilirubin, direct bilirubin, indirect bilirubin. Urinalysis tests performed include: protein, glucose, ketones, bilirubin, urobilinogen, nitrite content, pH, specific gravity, white blood cells, microscopic (red blood cells, white blood cells, casts, crystals).

Low systolic blood pressure: \< 90 and decrease (↓) of 30 mm Hg from baseline (BL) (ages 5-18); high systolic blood pressure: \> 160 and increase (↑) of 30 mm Hg from BL (age 5-12), \> 130 and ↑ of 30 mm Hg from BL (age 13-18). Low diastolic blood pressure: \< 45 and ↓ of 12 mm Hg from BL (age 5-12), \< 55 and ↓ of 12 mm Hg from BL (age 13-18), \< 50 and ↓ of 15 mm Hg from BL; high diastolic blood pressure: \> 85 and ↑ of 12 mm Hg from BL (ages 5-18). Low heart rate: \< 80 and and ↓ of 30 beats per minute (bpm) from BL (age 5-12), \< 60 and and ↓ of 30 bpm from BL (age 13-18), \< 50 and and ↓ of 15 bpm from BL (age \> 18); high heart rate: \> 120 and ↑ of 30 bpm from BL (age 5-12), \> 100 and ↑ of 30 bpm from BL (age 13-18), \> 100 and ↑ of 15 bpm from BL (age \> 18). Low oral body temperature: \< 35.8° Celsius (age 5 to \>18); high oral body temperature: \> 38.1° C and ↑ 2° Celsius from BL (age 5-18).

HEENT=head, eyes, ears, nose and throat.

The infusion site was assessed before treatment and within 30 minutes after the end of the infusion at each monthly treatment visit (or at early withdrawal if before Week 16). The infusion site was graded according to a 5-point scale as follows: 0=no tenderness at IV site, no erythema, no swelling, no induration, no purulence, no palpable venous cord; 1=tender IV site, no erythema, no swelling, no induration, no purulence, no palpable venous cord; 2=tender IV site with erythema, some degree of swelling, no induration, no purulence, no palpable venous cord; 3=tender IV site with erythema and swelling, with induration or palpable venous cord, no purulence; 4=frank vein thrombosis, along with all signs of grade 3 with purulence; IV may stop running because of thrombosis. After the 16-week visit, formal infusion site evaluations were not continued. However, any infusion site reactions were recorded as adverse events and graded as other adverse events.

Number of participants receiving therapeutic classes of concomitant medications.

The primary endpoint was the 5-level categorized percent reduction in OCS dose during weeks 20 to 24 compared with the optimized dose at baseline. The primary analysis incorporated data from all randomized patients. Analysis of the primary and secondary variables related to categorical OCS dose reduction incorporated missing data as non-responders. No decrease indicates there was no decrease in OCS, loss of baseline asthma control during weeks 20 to 24, or discontinuation from study drug.

A CAE was defined as a clinically-judged deterioration in asthma control, as determined by the investigator and as evidenced by new or worsening asthma signs or symptoms based on the participant's history, asthma control diary, physical examination, and/or ambulatory or clinic visit assessment of lung function and that resulted in a medical intervention, including at least 1 of the following: 1) use of systemic corticosteroids (oral or injection) or at least a doubling from a stable maintenance oral corticosteroid dose for at least 3 days; 2) asthma-specific hospital admission; 3) asthma-specific emergency department visit. Adjusted CAE rate and confidence intervals were based on Negative Binomial regression model adjusted for stratification factors. Results are presented as adjusted means. For this analysis, the offset variable is calculated as the logarithm of treatment duration minus the summed duration of exacerbations during the treatment period.

FEV1 is a standard measurement of air movement in the lungs of patients with asthma. It is the volume of air expired in the first second of a forced expiration. Improvement in FEV1 is a measure in the reduction of bronchospasm, the reduction of airway inflammation, or both. FEV1 was measured using forced expiratory air spirometry. Data represent the slope estimate of change from baseline in FEV1 (measured in liters) at Week 16 versus baseline eosinophil count (measured in 10\^9/liter) by treatment group.

An exacerbation event was considered a CAE if the patient met either or both of the criteria listed below and this was corroborated with at least 1 other measurement to indicate the worsening of clinical signs and symptoms of asthma: * use of systemic, or an increase in the use of inhaled, corticosteroid treatment for 3 or more days; or an increased 2 or more fold for at least 3 or more days for patient's already on corticosteroids. * asthma-related emergency treatment, such as an unscheduled visit to the physician's office or emergency room for nebulizer treatment or other urgent treatment to prevent worsening of asthma symptoms, or an asthma-related hospitalization CAEs were adjudicated by committee to assure consistency. Adjusted CAE rate and confidence intervals were based on Negative Binomial regression model adjusted for stratification factors. Results are offered as adjusted means.

An exacerbation event was considered a CAE if the patient met either or both of the criteria listed below and this was corroborated with at least 1 other measurement to indicate the worsening of clinical signs and symptoms of asthma: * use of systemic, or an increase in the use of inhaled, corticosteroid treatment for 3 or more days; or an increased 2 or more fold for at least 3 or more days for patient's already on corticosteroids. * asthma-related emergency treatment, such as an unscheduled visit to the physician's office or emergency room for nebulizer treatment or other urgent treatment to prevent worsening of asthma symptoms, or an asthma-related hospitalization. CAEs were adjudicated by committee to assure consistency. Adjusted CAE rate and confidence intervals for the two criteria were based on Negative Binomial regression model adjusted for stratification factors. Results are offered as adjusted means.

FEV1 is a standard measurement of air movement in the lungs of patients with asthma obtained from pulmonary function tests. It is the volume of air expired in the first second of a forced expiration using a spirometer. The during treatment (weeks 4, 8, 12 and 16) average FEV1 was estimated using a mixed-effect model for repeated measures (MMRM) with fixed effects (treatment, stratification factors, sex, visit, interaction of treatment and visit), covariates (height, baseline value), and patient as the random effect for the repeated measurements. Positive change from baseline scores indicate improvement in asthma control.

Change in Asthma Control Test score (ACT) between baseline and week 24.

Change in sputum eosinophil %

Change in blood eosinophil absolute number

The ACQ is a 7 question instrument. Each question has 7 possible answers of 0, 1, 2, 3, 4, 5, and 6. Each increasing value is an indication of poorer asthma control. At protocol specified visits, the participant answered questions 1 to 6, circling the response that best described how that participant was during the past week, on the basis of a daily diary for the week before the visit. At the actual visit, study center personnel reviewed the questions and responses with the participant and determined the response and score for question 7. The overall ACQ score was presented as the mean of these 7 individual scores and was a number between 0 and 6, but not necessarily an integer.

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.

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.

Absolute bioavailability calculated as (AUC0-∞)sc/(AUC0-∞)