Characteristics of phenotypes of elderly patients with asthma

Allergology International : Official Journal of the Japanese Society of Allergology
Hiroyuki SanoYuji Tohda

Abstract

The characteristics of phenotypes of elderly patients with asthma are unknown. The aim of this study was to classify these phenotypes using lung function tests and images from high-resolution computed tomography (HRCT), and to identify associations between clinical characteristics and phenotypes. A cross-sectional study was conducted in 165 elderly patients (>65 years of age) who underwent a multidimensional assessment of clinical and functional status and comorbidity. The patients were divided into three phenotypes: (1) asthma-predominant, (2) asthma-obstructive airway disease (OAD) overlap without emphysema, and (3) asthma-OAD overlap with emphysema (asthma-emphysema overlap) based on chest HRCT. A receiver operating characteristic (ROC) curve was constructed to evaluate the cutoff for differentiating between the two OAD phenotypes. Multivariate analysis was also used to distinguish between these two phenotypes. The phenotypes were asthma-predominant in 48 patients (29%), asthma-OAD without emphysema in 36 (22%), and asthma-emphysema in 81 (49%). Patients with asthma-emphysema were more frequent smokers. In multivariate analysis, smoking status (odds ratio 2.92: 95% CI 1.21-7.00, P = 0.03) and % predicted FEV1 ≤70% (odds rati...Continue Reading

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Citations

Mar 7, 2020·Allergy, Asthma & Immunology Research·Kyoung Hee SohnUNKNOWN Elderly Asthma Cohort in Korea Group
Nov 28, 2018·Allergy, Asthma & Immunology Research·Bastsetseg UlambayarHae Sim Park
Nov 28, 2018·Allergy, Asthma & Immunology Research·Byung Keun KimHeung Woo Park

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