Highlights
- •This is the first study to investigate the performance of the 6MST in COPD patients separated into different symptomatology groups based on the CAT questionnaire score.
- •Our study highlights the importance of the 6SMT associated with the CAT score, through the highlighted cut- off points (CAT 10 - 20), an important easy-to-apply tool that can be used in all cardiorespiratory rehabilitation environments and also help health professionals.
- •The 6MST can be useful to objectively assess the capability of new interventions (pharmacological and nonpharmacological) and assist in targeting specific assessments and optimal treatment during clinical practice by healthcare professionals.
Abstract
Background
This is the first study to investigate the performance of 6MST in COPD patients divided
into different symptom severity groups based on the CAT questionnaire score.
Objectives
To evaluate the relationship between the degree symptomatology using the chronic obstructive
pulmonary disease (COPD) Assessment Test (CAT) with the six- minute step test (6MST)
in COPD patients. METHODS: This is a cross-sectional study in which 59 patients with
COPD were evaluated. The groups were stratified according to the subsequent cutoff
points: CAT <10 (little impact) n= 22; CAT 11-20 (moderate impact) n=20; CAT <20 (large
impact) n=17. During 6MST the individuals were instructed to go up and down a single
step with a height of 20 centimeters (cm).
Results
Comparing the groups in relation to performance on the 6MST, the number of climbs
on the step were significantly higher in the CAT group <10 when compared to the CAT
group >20, the variation in HR between rest and peak exercise (∆ HRpeak- rest) was
lower in the CAT>20 group compared to the CAT<10 group and the CAT 11- 20 group. We
found direct relationships between the number of ascents and descents in the 6MST
vs the CAT score (r=0.35, p=0.007); and 6MST vs degree of obstruction of %FEV1 (r-0.46, p=0.002) We verified a linear regression
model in which the FEV1 (L) and the CAT score influenced 29% in the performance of
the 6MST.
Conclusion
The COPD severity represented by the FEV1 and the CAT score are associated and influenced by 29% the performance of 6-minute
step test. Our findings may have important implications for the clinical evaluation
of these patients as well as for rehabilitation.
Keywords
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Article info
Publication history
Published online: November 10, 2022
Accepted:
October 19,
2022
Received in revised form:
October 19,
2022
Received:
April 25,
2022
Identification
Copyright
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