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Therapeutic Effect of Omalizumab in Severe Asthma: A Real-World Study in Korea
Allergy, Asthma & Immunology Research ; : 121-130, 2018.
Article in English | WPRIM | ID: wpr-713204
ABSTRACT

PURPOSE:

Omalizumab, an anti-immunoglobulin E (IgE) monoclonal antibody, has proved to be effective for the treatment of severe asthma. However, there is no direct evidence of effectiveness of omalizumab in Korean patients with severe asthma. We sought to evaluate the real-world effectiveness of omalizumab in Korean adult patients suffering from severe asthma and to identify predictors of favorable response.

METHODS:

A retrospective analysis of electrical medical records was performed on severe allergic asthmatic patients with omalizumab treatment group (OT group) for more than 6 months between March 2008 and February 2016. Propensity score matching was applied to define the standardized treatment control group (STC group) treated without omalizumab. Asthma-related outcomes were compared between the 2 groups, and analyzed before and after omalizumab use in the OT group. Responders to treatment were defined as patients showing >50% reduction in asthma exacerbations and/or systemic steroid requirement during the outcome period.

RESULTS:

One hundred twenty-four patients with severe asthma (62 in the OT group; 62 in the STC group) were enrolled in the study. Proportion of patients having the reduction of asthma exacerbation (53.2% vs 35.5%, P=0.015) and the rate of responders (67.7% vs 41.9%, P=0.007) were significantly higher in the OT group than in the STC group. Significant reductions were noted in asthma exacerbation (P=0.006), hospitalization (P=0.009), hospitalization days (P=0.006), systemic corticosteroid requirements (P=0.027), and sputum eosinophil count (P=0.031) in OT group compared with STC group. There were no significant differences in changes of forced expiratory volume in the 1 second (FEV1) levels between the 2 groups. No predictors of responders were found for omalizumab treatment.

CONCLUSIONS:

Omalizumab can reduce exacerbations/hospitalization/systemic steroid burst in Korean adult patients with severe asthma.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Asthma / Sputum / Forced Expiratory Volume / Medical Records / Retrospective Studies / Eosinophils / Propensity Score / Omalizumab / Hospitalization / Korea Type of study: Observational study / Prognostic study Limits: Adult / Humans Country/Region as subject: Asia Language: English Journal: Allergy, Asthma & Immunology Research Year: 2018 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Asthma / Sputum / Forced Expiratory Volume / Medical Records / Retrospective Studies / Eosinophils / Propensity Score / Omalizumab / Hospitalization / Korea Type of study: Observational study / Prognostic study Limits: Adult / Humans Country/Region as subject: Asia Language: English Journal: Allergy, Asthma & Immunology Research Year: 2018 Type: Article