What is the influence of exacerbations on pulmonary function in pediatric and adolescent patients with severe asthma despite controller therapies?

IF 4.6 2区医学 Q2 ALLERGY

Clinical and Translational Allergy Pub Date : 2025-04-04 DOI:10.1002/clt2.70046

A. Z. P. Brandão, L. M. L. B. F. Lasmar, L. M. A. S. Pertence, M. I. R. Vieira, G. B. Lasmar, V. O. Ganem, E. V. Mancuzo, M. V. N. P. de Queiroz

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Abstract

Background

Although exacerbations are common in severe asthma, there have been few longitudinal studies evaluating their effect on lung function parameters. This study aimed to evaluate the impact of exacerbations on lung function in children and adolescents with severe asthma in Brazil.

Methods

This was a prospective study in which lung function parameters—forced vital capacity (forced vital capacity [FVC]), forced expiratory volume in 1 s (forced expiratory volume in 1 s [FEV1]), the FEV₁/FVC ratio, and the forced expiratory flow between 25% and 75% of FVC (FEF_25–75%), each expressed as a percentage of the predicted value—were measured at 3-month intervals for three years in 64 patients (6–18 years of age) with severe asthma. Multivariate regression models of longitudinal data were employed to assess the associations between exacerbations and other predictors show with lung function parameters.

Results

The mean duration of prior use of an inhaled corticosteroid together with a long-acting bronchodilator or other controller was 6.7 (SD 3.2) years. During the study period, 31 patients (48.5%) had exacerbations. We analyzed 479 pulmonary function tests and found no significant association between exacerbation and any of the lung function parameters: FEV₁ (p = 0.90); FEF_25–75% (p = 0.73); FEV₁/FVC (p = 0.29); and FVC (p = 0.51). Passive smoking and being female were associated with mean FEV₁ values that were 9.89% and 7.32% lower, respectively.

Conclusions

In children and adolescents with severe asthma who are using preventive treatment, exacerbations do not seem to be associated with impaired lung function.

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来源期刊

Clinical and Translational Allergy Immunology and Microbiology-Immunology

CiteScore

7.50

自引率

4.50%

发文量

117

审稿时长

12 weeks

期刊介绍： Clinical and Translational Allergy, one of several journals in the portfolio of the European Academy of Allergy and Clinical Immunology, provides a platform for the dissemination of allergy research and reviews, as well as EAACI position papers, task force reports and guidelines, amongst an international scientific audience. Clinical and Translational Allergy accepts clinical and translational research in the following areas and other related topics: asthma, rhinitis, rhinosinusitis, drug hypersensitivity, allergic conjunctivitis, allergic skin diseases, atopic eczema, urticaria, angioedema, venom hypersensitivity, anaphylaxis, food allergy, immunotherapy, immune modulators and biologics, animal models of allergic disease, immune mechanisms, or any other topic related to allergic disease.