Exacerbation during the first year of treatment affects lung function in subjects with asthma - a 10-year follow-up.

医学 哮喘 肺功能 恶化 哮喘恶化 肺功能测试 内科学 物理疗法 儿科
作者
Paula Almeida,Eduardo Vieira Ponte,Rafaël Stelmach,TW Harrison,Nicola Scichilone,Adelmir Souza‐Machado,AA Cruz
出处
期刊:Journal of Asthma [Taylor & Francis]
卷期号:: 1-14
标识
DOI:10.1080/02770903.2025.2451690
摘要

Inhaled corticosteroids (ICS) are the preferred treatment for asthma. They improve symptoms and reduce exacerbations and deaths, but their long-term impact on lung function loss remains unclear, especially after delayed treatment. We aimed to characterize the lung function trajectories in subjects with previously untreated severe asthma. The secondary aim was to identify predictors of FEV1 decline, and future exacerbations. This is a post-hoc analysis that followed 184 subjects with asthma for 10 years after a delayed start of regular maintenance ICS treatment. Absolute lung function variation was calculated using two different baselines: (i) FEV1 after one year of regular treatment (V1) and (ii) best FEV1 observed any time before the final visit. Most individuals were female (84%) over 50 years old and had early-onset asthma with a median of 30 years without regular ICS treatment. Ninety-nine (54%) had an FEV1 decline above 25ml/year, using strategy (i). Those subjects were younger, had shorter duration of asthma, and had better lung function at V1. Most of the participants without any obstructive pattern (74%) or with mild obstruction (64%) at V1 showed a faster absolute FEV1 decline, however PRISm showed faster relative decline than the other groups. Therefore, this study showed improved symptoms and quality of life with variable lung function trajectories among individuals with asthma who start regular treatment after decades of delay. Additionally, exacerbation during the first year was a strong predictor of absolute FEV1 decline and future exacerbations, while time without treatment was a predictor of relative reduction of FEV1.
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