Abstract
Major randomized clinical trials have shown that biological therapy can reduce the exacerbation rate and oral corticosteroid (OCS) dosage in patients with severe eosinophilic asthma. However, data on the continuation, efficacy, and safety of biological therapy in older patients with asthma are limited. Therefore, the aim of this study was to evaluate the differences in the continuation rate, efficacy, and safety of biological therapy between older (≥ 65 years) and younger (< 65 years) patients with asthma. In this single-center retrospective observational study, we collected clinical data of patients with asthma who were administered biological drugs such as omalizumab, mepolizumab, benralizumab, and dupilumab between April 2009 and August 2022. We comparatively analyzed the continuation, efficacy, and safety of biological therapy between older (age ≥ 65 years) and younger patient (age < 65 years) groups. The reasons for discontinuation or switching of biological drugs were also evaluated. Sixty-two (31 older and 31 younger) patients were treated with 91 biologics during the observational period. The mean age of older patients was 74.3 ± 5.1 years and that of younger patients was 48.0 ± 14.0 years. The continuation rate of biological therapy was not significantly different between the groups. Social background was the most common reason for discontinuation of biological therapy in both groups, and insufficient effect was the most common reason for switching to biological drugs. Asthma exacerbations decreased in both groups within the first 12 months of biologic therapy. The dosage of OCS tended to decrease in the older group and significantly decrease in the younger group. Biologic therapy for older patients with asthma can be continued, with efficacy and safety similar to those in younger patients with asthma.
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