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Improvement of patient-reported outcomes in severe allergic asthma by omalizumab treatment: the real life observational PROXIMA study.
Background: Data on the prevalence of perennial versus seasonal allergic asthma in Italy are lacking; moreover, there is limited evidence on the effect of omalizumab on patient-reported outcomes in Italian patients with severe allergic asthma. PROXIMA, an observational, multicenter study, was designed to assess the prevalence of perennial versus seasonal allergic asthma (cross-sectional phase) and the effect of omalizumab on improving illness perception, quality of life (QoL) and asthma control of Italian patients with severe allergic asthma (longitudinal phase).
Methods: The study included a cross-sectional phase ( n = 357) and a longitudinal phase ( n = 123): during the longitudinal phase, patients received omalizumab (75-600 mg subcutaneously every month) and were followed-up for 12 months. The primary parameter of cross-sectional phase was prevalence of perennial allergic asthma and that of longitudinal phase was proportion of patients with asthma control (assessed using asthma control questionnaire [ACQ]). Secondary parameters assessed were patients' disease perception, level of asthma control, exacerbation rate during both cross-sectional and longitudinal phases, and patients' compliance to and persistence with omalizumab, and patients' QoL during the longitudinal phase.
Results: Most patients (95.8%) had perennial allergies; 81% had polysensitization. Of 99 patients in the per-protocol set, 95 (95.96% [95% CI: 89.98-98.89%]) achieved asthma control (ACQ < 4) at both 6 and 12 months of omalizumab treatment; ACQ score decreased after 6 and 12 months ( P < 0.0001). Omalizumab treatment resulted in a significant improvement in QoL and patients' illness perception and 87% decrease in exacerbation rate. The compliance rate with omalizumab was high (73.2%). No new safety signals were identified during treatment.
Conclusion: This study demonstrated that in severe allergic asthma, omalizumab improves patient-reported outcomes such as patients' illness perception and QoL, while confirming improvement of asthma control and exacerbation rate reduction in Italian patients.
Methods: The study included a cross-sectional phase ( n = 357) and a longitudinal phase ( n = 123): during the longitudinal phase, patients received omalizumab (75-600 mg subcutaneously every month) and were followed-up for 12 months. The primary parameter of cross-sectional phase was prevalence of perennial allergic asthma and that of longitudinal phase was proportion of patients with asthma control (assessed using asthma control questionnaire [ACQ]). Secondary parameters assessed were patients' disease perception, level of asthma control, exacerbation rate during both cross-sectional and longitudinal phases, and patients' compliance to and persistence with omalizumab, and patients' QoL during the longitudinal phase.
Results: Most patients (95.8%) had perennial allergies; 81% had polysensitization. Of 99 patients in the per-protocol set, 95 (95.96% [95% CI: 89.98-98.89%]) achieved asthma control (ACQ < 4) at both 6 and 12 months of omalizumab treatment; ACQ score decreased after 6 and 12 months ( P < 0.0001). Omalizumab treatment resulted in a significant improvement in QoL and patients' illness perception and 87% decrease in exacerbation rate. The compliance rate with omalizumab was high (73.2%). No new safety signals were identified during treatment.
Conclusion: This study demonstrated that in severe allergic asthma, omalizumab improves patient-reported outcomes such as patients' illness perception and QoL, while confirming improvement of asthma control and exacerbation rate reduction in Italian patients.
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