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Six-minute walk test and respiratory muscle strength in patients with uncontrolled severe asthma: a pilot study.

Overview of attention for article published in Jornal Brasileiro de Pneumologia, May 2015
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Title
Six-minute walk test and respiratory muscle strength in patients with uncontrolled severe asthma: a pilot study.
Published in
Jornal Brasileiro de Pneumologia, May 2015
DOI 10.1590/s1806-37132015000004483
Pubmed ID
Authors

Pereira, Luiz Fernando Ferreira, Mancuzo, Eliane Viana, Rezende, Camila Farnese, Côrrea, Ricardo de Amorim, Pereira, Luiz Fernando Ferreira, Mancuzo, Eliane Viana, Rezende, Camila Farnese, Côrrea, Ricardo de Amorim

Abstract

To evaluate respiratory muscle strength and six-minute walk test (6MWT) variables in patients with uncontrolled severe asthma (UCSA). This was a cross-sectional study involving UCSA patients followed at a university hospital. The patients underwent 6MWT, spirometry, and measurements of respiratory muscle strength, as well as completing the Asthma Control Test (ACT). The Mann-Whitney test was used in order to analyze 6MWT variables, whereas the Kruskal-Wallis test was used to determine whether there was an association between the use of oral corticosteroids and respiratory muscle strength. We included 25 patients. Mean FEV1 was 58.8 ± 21.8% of predicted, and mean ACT score was 14.0 ± 3.9 points. No significant difference was found between the median six-minute walk distance recorded for the UCSA patients and that predicted for healthy Brazilians (512 m and 534 m, respectively; p = 0.14). During the 6MWT, there was no significant drop in SpO2. Mean MIP and MEP were normal (72.9 ± 15.2% and 67.6 ± 22.2%, respectively). Comparing the patients treated with at least four courses of oral corticosteroids per year and those treated with three or fewer, we found no significant differences in MIP (p = 0.15) or MEP (p = 0.45). Our findings suggest that UCSA patients are similar to normal subjects in terms of 6MWT variables and respiratory muscle strength. The use of oral corticosteroids has no apparent impact on respiratory muscle strength.

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Mendeley readers

The data shown below were compiled from readership statistics for 32 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 32 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 6 19%
Student > Bachelor 5 16%
Student > Postgraduate 4 13%
Other 3 9%
Student > Doctoral Student 3 9%
Other 9 28%
Unknown 2 6%
Readers by discipline Count As %
Medicine and Dentistry 13 41%
Nursing and Health Professions 5 16%
Sports and Recreations 3 9%
Psychology 1 3%
Immunology and Microbiology 1 3%
Other 1 3%
Unknown 8 25%