Mode of Action Study of Omalizumab in Patients With Chronic Idiopathic Urticaria (CIU) Who Fail to Respond to Antihistamine Treatment

Observed values and absolute change in FcεRI positive skin cells: dermis non-lesional and lesional. The primary variable for this study was the relative change from baseline in the high affinity IgE receptor (FcεRI) positive skin cells, based on skin biopsies collected from patients with CIU after 12 weeks of treatment.The values are average of cell numbers derived from counting 5 consecutive microscopic fields. Area counted is 5x 0.196 mm2

Observed values and absolute change in IgE positive skin cells: dermis non-lesional and lesional The primary variable for this study was the relative change from baseline in IgE positive skin cells, based on skin biopsies collected from patients with CIU after 12 weeks of treatment. The values are average of cell numbers derived from counting 5 consecutive microscopic fields. Area counted is 5x 0.196 mm2

Correlation of primary endpoint with The UAS7 which is a composite eDiary-recorded score with numeric severity intensity ratings on a scale of 0-3 (0 = none to 3 = intense/severe) for 1) the number of wheals (hives); and 2) the intensity of the itch. The daily UAS is the average of the morning and evening scores and the UAS7 is the sum of the daily UAS scores over 7 days.UAS7 score: The sum of the daily UAS scores over 7 days. Range: 0-42. If fewer than 7 but at least 4 daily values were non-missing, the remaining values were imputed to be the average. This is equivalent to multiplying the average of the non missing values by 7. UAS7 score: The sum of the daily UAS scores over 7 days. Range: 0-42. A higher score indicates worse disease.

Correlation of primary endpoint with The UAS7 which is a composite eDiary-recorded score with numeric severity intensity ratings on a scale of 0-3 (0 = none to 3 = intense/severe) for 1) the number of wheals (hives); and 2) the intensity of the itch. The daily UAS is the average of the morning and evening scores and the UAS7 is the sum of the daily UAS scores over 7 days.UAS7 score: The sum of the daily UAS scores over 7 days. Range: 0-42. If fewer than 7 but at least 4 daily values were non-missing, the remaining values were imputed to be the average. This is equivalent to multiplying the average of the non missing values by 7. UAS7 score: The sum of the daily UAS scores over 7 days. Range: 0-42. A higher score indicates worse disease.

The average number of cells derived from counting 5 consecutive microscopic fields. Area counted is 5x 0.196 mm2

Fluorescence-activated cell sorting (FACS) is a specialized type of flow cytometry that provides a method for sorting a heterogeneous mixture of biological cells into two or more containers, one cell at a time, based upon the specific light scattering and fluorescent characteristics of each cell. (FACS) provides fast, objective and quantitative recording of fluorescent signals from individual cells as well as physical separation of cells of particular interest. A wide range of fluorophores can be used as labels in flow cytometry. Fluorophores are typically attached to an antibody that recognizes a target feature on or in the cell; they may also be attached to a chemical entity with affinity for the cell membrane or another cellular structure. Each fluorophore has a characteristic peak excitation and emission wavelength.

Fluorescence-activated cell sorting (FACS) is a specialized type of flow cytometry that provides a method for sorting a heterogeneous mixture of biological cells into two or more containers, one cell at a time, based upon the specific light scattering and fluorescent characteristics of each cell. (FACS) provides fast, objective and quantitative recording of fluorescent signals from individual cells as well as physical separation of cells of particular interest. A wide range of fluorophores can be used as labels in flow cytometry. Fluorophores are typically attached to an antibody that recognizes a target feature on or in the cell; they may also be attached to a chemical entity with affinity for the cell membrane or another cellular structure. Each fluorophore has a characteristic peak excitation and emission wavelength.

The # positive cell values are average of cell numbers derived from counting 5 consecutive microscopic fields. Area counted is 5x 0.196 mm2

Serum concentrations (ng/mL) of omalizumab by visit after the administration of omalizumab 300 mg every 4 weeks

Efficacy was assessed by the urticaria activity score (UAS). UAS was completed each morning and evening on a daily basis to record patient symptoms of itch and hives via an electronic diary. The UAS is a composite eDiary-recorded score with numeric severity intensity ratings on a scale of 0-3 (0 = none to 3 = intense/severe) for 1) the number of wheals (hives); and 2) the intensity of the itch. The daily UAS is the average of the morning and evening scores and the UAS7 is the sum of the daily UAS scores over 7 days.UAS7 score: The sum of the daily UAS scores over 7 days. Range: 0-42. If fewer than 7 but at least 4 daily values were non-missing, the remaining values were imputed to be the average. This is equivalent to multiplying the average of the non missing values by 7. UAS7 score: The sum of the daily UAS scores over 7 days. Range: 0-42. A higher score indicates worse disease. A negative change score (Week 12 score minus Baseline score) indicates improvement.

The investigator or the person he or she designated and the patient provided scoring of the patient's global assessment of symptoms (urticaria lesions (hives) and pruritus) reflective of the patient's condition over the 12 hours prior to the visit (0 = no symptoms, 1 = mild, 2 = moderate 3 = severe

The DLQI is a 10-item dermatology-specific health-related quality of life measure. Patients rated their dermatology symptoms as well as the impact of their skin condition on various aspects of their lives. An overall score was calculated as well as for the following domains: Symptoms and Feelings, Daily Activities, Leisure, Work and School, Personal Relationships, Treatment.Negative score shows positive efficacy. Meaning of DLQI Scores 0-1 = no effect at all on patient's life 2-5 = small effect on patient's life 6-10 = moderate effect on patient's life 11-20 = very large effect on patient's life 21-30 = extremely large effect on patient's life. The DLQI is calculated by summing the score of each question resulting in a maximum of 30 and a minimum of 0. The higher the score, the more quality of life is impaired. The DLQI can also be expressed as a percentage of the maximum possible score of 30.

The Skindex-29 is a validated 29-item instrument to measure the effects of skin disease on patients' quality of life.Results are reported as 3 scale scores (functioning, emotions and symptoms) and a composite score (average scale score). The domain scores and the overall score are expressed on a 100-point scale, with higher scores indicating a lower level of quality of life. The cuttoff values for each category are noted below. Symtoms; 39 mild, 42 moderate,52 severe. Emotions; 24 mild, 35 moderate, 39 severe. Functioning: 21 mild, 32 moderate, 37 severe. Overal Score: 25 mild, 32 moderate, 44 severe.

The Cu-Q2OL is a 23-item CIU-specific health-related quality of life questionnaire. Patients rated their CIU symptoms and the impact of their CIU on various aspects of their lives. An overall score was calculated as well for the following domains: pruritus, swelling, impact on life activities, sleep problems, limits, and looks. Zero is the minmum score and 100 the maximum score. The higher score correlates to more disease activity.