RT Journal Article
SR Electronic
T1 Phenotypes of symptomatic airways disease in China and New Zealand
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP 1700957
DO 10.1183/13993003.00957-2017
VO 50
IS 6
A1 James Fingleton
A1 Kewu Huang
A1 Mark Weatherall
A1 Yanfei Guo
A1 Stefan Ivanov
A1 Piet Bruijnzeel
A1 Hong Zhang
A1 Wei Wang
A1 Richard Beasley
A1 Chen Wang
A1 ,
YR 2017
UL http://erj.ersjournals.com/content/50/6/1700957.abstract
AB It is uncertain whether phenotypes of asthma and chronic obstructive pulmonary disease (COPD) vary between populations with different genetic and environmental characteristics. Here, our objective was to compare the phenotypes of airways disease in two separate populations.This was a cross-sectional observational study in adult populations from New Zealand and China. Participants aged 40–75 years who reported wheeze and breathlessness in the last 12 months were randomly selected from the general population and underwent detailed characterisation. Complete data for cluster analysis were available for 345 participants. Hierarchical cluster analysis was undertaken, based on 12 variables: forced expiratory volume in 1 s (FEV1), FEV1/forced vital capacity ratio, bronchodilator reversibility, peak expiratory flow variability, transfer coefficient of the lung for carbon monoxide, exhaled nitric oxide fraction, total IgE, C-reactive protein, age of symptom onset, body mass index, health status and cigarette smoke exposure.Cluster analysis of the combined dataset described five phenotypes: “severe late-onset asthma/COPD overlap group”, “moderately severe early-onset asthma/COPD overlap group”, “moderate to severe asthma group with type 2 predominant disease”, and two groups with minimal airflow obstruction, differentiated by age of onset. Separate analyses by country showed similar patterns; however, a distinct obese/comorbid group was observed in the New Zealand population.Cluster analysis of adults with symptomatic airways disease suggests the presence of similar asthma/COPD overlap phenotypes within populations with different genetic and environmental characteristics, and an obese/comorbid phenotype in a Western population.Evidence of asthma/COPD overlap phenotypes in China and NZ populations and obese/comorbid group in NZ http://ow.ly/APWk30eVBm5