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Correlation between perceived asthma control and thoraco-abdominal asynchrony in primary care patients diagnosed with asthma

Record type: Article

Objective. Thoraco-abdominal asynchrony (TAA), the discordant movement of the abdomen and thorax, may impact upon health-related variables. Here, we investigated the extent to which TAA is associated with health-related variables, particularly perceived asthma control and quality of life.
Methods. Ambulatory respiratory data from 43 patients diagnosed with asthma and 43 healthy age and sex-matched controls were recorded over 4 hours. Phase relation (Ph Rel Total), the percentage of time that the effects of rib cage (RC) and diaphragmatic movement result in opposite effects on intra-thoracic volume, quantified TAA. Subjects completed the Mini Asthma Quality of Life Questionnaire (AQLQ), Asthma Control Questionnaire (ACQ), Nijmegen questionnaire (NQ), Hospital Anxiety and Depression Scale (HADS), Spielberger State-Trait Anxiety Inventory (STAI), and General Health Perception (GHP) subscale of the short form 36 questionnaire. Capnography profiling, breath-hold time (BHT), and standard spirometry were performed.
Results. The time in asynchrony was significantly greater in the asthma than in the healthy control group (Ph Rel Total = 14% (interquartile range (IQR) 8.5–20.7%) versus 10.4% (IQR 7.1–14.5%), p = .012). In patients with asthma, Ph Rel Total was weakly associated with poorer ACQ scores (r = 0.33, p = .03), and in the healthy control group with GHP (r = 0.319, p = .037). Post-hoc exploratory analysis revealed a moderate relationship in the female asthma subgroup between Ph Rel Total and AQLQ (r = -0.56, p = .003).
Conclusions. TAA may be associated with decreased perceived asthma control. In healthy individuals, asynchrony may be associated with low perception of general health. Further studies are required to investigate if the reduction of TAA improves these health-related variables.

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Upton, Jane, Brodie, David, Beales, David, Richardson, Janet, Jack, Sandy, Warburton, Chris, Thomas, Mike and Kendrick, Adrian (2012) Correlation between perceived asthma control and thoraco-abdominal asynchrony in primary care patients diagnosed with asthma Journal of Asthma, 49, (8), pp. 822-9. (doi:10.3109/02770903.2012.717658). (PMID:22957811).

More information

Published date: October 2012
Keywords: breathing training, perceived asthma control, respiratory pattern
Organisations: Primary Care & Population Sciences


Local EPrints ID: 343340
ISSN: 0277-0903
PURE UUID: 658c1756-0e56-44c1-a722-406c7065613e

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Date deposited: 03 Oct 2012 11:14
Last modified: 18 Jul 2017 05:23

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Author: Jane Upton
Author: David Brodie
Author: David Beales
Author: Janet Richardson
Author: Sandy Jack
Author: Chris Warburton
Author: Mike Thomas
Author: Adrian Kendrick

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