Inflammatory patterns in fixed airflow obstruction are dependent on the presence of asthma

Data de publicação: Data Ahead of Print:

Autores da FMUP

  • Tiago António Queiros Jacinto

    Autor

  • João De Almeida Lopes Da Fonseca

    Autor

Participantes de fora da FMUP

  • Mogensen, I
  • Alving, K
  • Janson, C
  • Malinovschi, A

Unidades de investigação

Abstract

Rationale Fixed airflow obstruction (FAO) can complicate asthma. Inflammation is a proposed underlying mechanism. Objective Our aim in this cross-sectional investigation was to evaluate the blood leucocyte pattern and level of exhaled nitric oxide in asthmatics and non-asthmatics with or without FAO. Methods A total of 11,579 individuals aged >= 20 years from the US National Health and Nutrition Examination Survey were included. They were grouped as: controls without asthma and FAO (n = 9,935), asthmatics without FAO (n = 674), asthmatics with FAO (n = 180) and non-asthmatics with FAO (n = 790). FAO was defined as post-bronchodilator FEV1/FVC < lower limit of normal. Exhaled nitric oxide >= 25ppb, blood eosinophil levels >= 300 cells/mu L, and blood neutrophil levels >= 5100 cells/mu L were defined as elevated. Stratified analyses for smoking and smoking history were performed. Results Elevated blood eosinophil levels were more common in all groups compared to the controls, with the highest prevalence in the group with asthma and fixed airflow obstruction (p<0.01). In a multiple logistic regression model adjusted for potential confounders including smoking, the asthma groups had significantly higher odds ratios for elevated B-Eos levels compared to the control group (odds ratio 1.4, (confidence interval: 1.1-1.7) for the asthma group without fixed airflow obstruction and 2.5 (1.4-4.2) for the asthma group with fixed airflow obstruction). The group with fixed airflow obstruction without asthma had higher odds ratio for elevated blood neutrophil levels compared to the controls: 1.4 (1.1-1.8). Smoking and a history of smoking were associated to elevated B-Neu levels. Conclusion Fixed airflow obstruction in asthma was associated with elevated blood eosinophil levels, whereas fixed airflow obstruction without asthma was associated with elevated blood neutrophil levels.

Dados da publicação

ISSN/ISSNe:
1932-6203, 1932-6203

PLoS ONE  Public Library of Science

Tipo:
Article
Páginas:
-
Link para outro recurso:
www.scopus.com

Citações Recebidas na Web of Science: 4

Citações Recebidas na Scopus: 4

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Keywords

  • EXHALED NITRIC-OXIDE; REFERENCE VALUES; BLOOD; OBESITY; DETERMINANTS; EOSINOPHILIA; LIMITATION; PHENOTYPES; SMOKING; DECLINE

Financiamento

Proyectos asociados

Utilização em estudos observacionais do Registo de Asma Grave Portugal.

Investigador Principal: João de Almeida Lopes da Fonseca

Estudo Observacional Académico (RAG) . 2020

Use of secondary data, health technology assessment methods and economic modelling applied to penicillin allergy

Investigador Principal: João de Almeida Lopes da Fonseca

Estudo Clínico Académico . 2020

Using different data sources for the identification of asthma patients and those at high risk of adverse outcomes

Investigador Principal: João de Almeida Lopes da Fonseca

Estudo Clínico Académico . 2020

Phenotypes of Chronic Diseases of the Airways: Towards Multidimensional Data -Driven Profiling

Investigador Principal: João de Almeida Lopes da Fonseca

Estudo Clínico Académico . 2020

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