The six-minute step test can predict COPD exacerbations: a 36-month follow-up study

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作者
Aldair Darlan Santos-de-Araújo
Cássia da Luz Goulart
Renan Shida Marinho
Izadora Moraes Dourado
Renata Gonçalves Mendes
Meliza Goi Roscani
Daniela Bassi-Dibai
Shane A. Phillips
Ross Arena
Audrey Borghi-Silva
机构
[1] Universidade Federal de São Carlos,Cardiopulmonary Physiotherapy Laboratory
[2] Universidade Federal de São Carlos (UFSCar),Department of Medicine
[3] Universidade CEUMA,Postgraduate Program in Management in Health Programs and Services
[4] University of Illinois Chicago,Department of Physical Therapy, College of Applied Health Sciences
来源
Scientific Reports | / 14卷
关键词
Chronic obstructive pulmonary disease; Functional capacity; Six-minute step test; Exacerbation;
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摘要
The six-minute step test (6MST) has been shown to be effective in assessing exercise capacity in individuals with COPD regardless of severity and, despite its easy execution, accessibility and validity, information on the prognostic power of this test remains uncertain. The aim of this study is to investigate whether the 6MST can predict the occurrence of exacerbations in patients with COPD. This is a prospective cohort study with a 36-month follow-up in patients with COPD. All patients completed a clinical assessment, followed by pulmonary function testing and a 6MST. The 6MST was performed on a 20 cm high step; heart rate, blood pressure, oxygen saturation, BORG dyspnea and fatigue were collected. Sixty-four patients were included in the study, the majority being elderly men. Performance on the 6MST demonstrated lower performance compared to normative values proposed in the literature, indicating a reduced functional capacity. Kaplan Meier analysis revealed that ≤ 59 steps climbed during the 6MST was a strong predictor of COPD exacerbation over a 36-month follow-up. We have identified a minimal threshold number of steps (≤ 59) obtained through the 6MST may be able predict the risk of exacerbations in patients with COPD.
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