Format

Send to

Choose Destination
Eur Respir J. 2017 Dec 7;50(6). pii: 1700957. doi: 10.1183/13993003.00957-2017. Print 2017 Dec.

Phenotypes of symptomatic airways disease in China and New Zealand.

Author information

1
Medical Research Institute of New Zealand, Wellington, New Zealand james.fingleton@mrinz.ac.nz.
2
Capital and Coast District Health Board, Wellington, New Zealand.
3
Victoria University of Wellington, Wellington, New Zealand.
4
Joint first authors.
5
Dept of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, PR China.
6
University of Otago Wellington, Wellington, New Zealand.
7
Dept of Pulmonary and Critical Care Medicine, Beijing Hospital, Ministry of Health, Beijing, PR China.
8
AstraZeneca, Molndal, Sweden.
9
Medical Research Institute of New Zealand, Wellington, New Zealand.
10
Joint last authors.
11
Dept of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, PR China.
12
Capital Medical University, Beijing, PR China.

Abstract

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.

PMID:
29217598
DOI:
10.1183/13993003.00957-2017
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for HighWire
Loading ...
Support Center