TY - JOUR AU - Wright C. AU - Marks G. AU - Jenkins C. AU - Guo M. AU - Wark P. AU - Gibson P. AU - Peters M. AU - Reddel H. AU - Upham J. AU - Hew M. AU - Gillman A. AU - Sutherland M. AU - Bowden J. AU - Thien F. AU - Rimmer J. AU - Katsoulotos G. AU - Cook M. AU - Yang I. AU - Katelaris C. AU - Bowler S. AU - Langton D. AU - Bint M. AU - Yozghatlian V. AU - Burgess S. AU - Sivakumaran P. AU - Yan K. AU - Kritikos V. AU - Baraket M. AU - Aminazad A. AU - Robinson P. AU - Jaffe A. AU - Powell H. AU - McDonald V. AB -
BACKGROUND: Omalizumab (Xolair) dosing in severe allergic asthma is based on serum IgE and bodyweight. In Australia, patients eligible for omalizumab but exceeding recommended ranges for IgE (30-1500 IU/mL) and bodyweight (30-150 kg) may still receive a ceiling dose of 750 mg/4 weeks. 62% of patients receiving government-subsidised omalizumab are enrolled in the Australian Xolair Registry (AXR). OBJECTIVES: To determine if AXR participants above the recommended dosing ranges benefit from omalizumab, and to compare their response to within-range participants. METHODS: Data were stratified according to dose-range status (above or within-range). Further sub-analyses were conducted according to the reason for being above the dosing range (IgE only versus IgE and weight). RESULTS: Data for 179 participants were analyzed. 55 (31%) were above recommended dosing criteria; other characteristics were similar to within-range participants. Above-range participants had higher baseline IgE [812 (IQR 632, 1747) IU/ml vs 209 (IQR 134, 306) IU/ml], and received higher doses of omalizumab [750 (IQR 650, 750) mg] compared to within-range participants [450 (IQR, 300, 600) mg]. At 6 months, improvements in Juniper 5-item Asthma Control Questionnaire (ACQ-5, 3.61 down to 2.01 for above-range, 3.47 down to 1.93 for within-range, p < 0.0001 for both) and Asthma Quality of Life Questionnaire (AQLQ mean score (3.22 up to 4.41 for above-range, 3.71 up to 4.88 for within-range, p < 0.0001) were observed in both groups. Forced expiratory volume in one second (FEV1 ) improved among above-range participants. There was no difference in response between above-range and within-range participants. Above-range participants due to either IgE alone or IgE and weight had similar improvements in ACQ-5, AQLQ and FEV1 . CONCLUSIONS & RELEVANCE: Patients with severe allergic asthma above recommended dosing criteria for omalizumab have significantly improved symptom control, quality of life, and lung function to a similar degree to within-range participants, achieved without dose escalation above 750 mg. This article is protected by copyright. All rights reserved.
AD - The Alfred Hospital & Monash University, Melbourne, VIC 3004.BACKGROUND: Omalizumab (Xolair) dosing in severe allergic asthma is based on serum IgE and bodyweight. In Australia, patients eligible for omalizumab but exceeding recommended ranges for IgE (30-1500 IU/mL) and bodyweight (30-150 kg) may still receive a ceiling dose of 750 mg/4 weeks. 62% of patients receiving government-subsidised omalizumab are enrolled in the Australian Xolair Registry (AXR). OBJECTIVES: To determine if AXR participants above the recommended dosing ranges benefit from omalizumab, and to compare their response to within-range participants. METHODS: Data were stratified according to dose-range status (above or within-range). Further sub-analyses were conducted according to the reason for being above the dosing range (IgE only versus IgE and weight). RESULTS: Data for 179 participants were analyzed. 55 (31%) were above recommended dosing criteria; other characteristics were similar to within-range participants. Above-range participants had higher baseline IgE [812 (IQR 632, 1747) IU/ml vs 209 (IQR 134, 306) IU/ml], and received higher doses of omalizumab [750 (IQR 650, 750) mg] compared to within-range participants [450 (IQR, 300, 600) mg]. At 6 months, improvements in Juniper 5-item Asthma Control Questionnaire (ACQ-5, 3.61 down to 2.01 for above-range, 3.47 down to 1.93 for within-range, p < 0.0001 for both) and Asthma Quality of Life Questionnaire (AQLQ mean score (3.22 up to 4.41 for above-range, 3.71 up to 4.88 for within-range, p < 0.0001) were observed in both groups. Forced expiratory volume in one second (FEV1 ) improved among above-range participants. There was no difference in response between above-range and within-range participants. Above-range participants due to either IgE alone or IgE and weight had similar improvements in ACQ-5, AQLQ and FEV1 . CONCLUSIONS & RELEVANCE: Patients with severe allergic asthma above recommended dosing criteria for omalizumab have significantly improved symptom control, quality of life, and lung function to a similar degree to within-range participants, achieved without dose escalation above 750 mg. This article is protected by copyright. All rights reserved.
PY - 2016 SN - 1365-2222 (Electronic)