Construct validity and reproducibility of the six-minute step test in subjects with obstructive sleep apnea treated with continuous positive airway pressure
| Autor: | Ana Maria Bezerra Santos, Matheus Gustavo Silva Magalhães, Thayse Neves Santos Silva, Danielle Cristina Silva Clímaco, Anna Myrna Jaguaribe de Lima, Juliana Baptista Teixeira |
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| Jazyk: | angličtina |
| Předmět: |
Reproducibility of results
Exercise test medicine.medical_treatment Reprodutibilidade dos testes Teste de esforço Diseases of the respiratory system Exercise tolerance medicine Sleep apnea obstructive Humans Continuous positive airway pressure Tolerância ao exercício Reproducibility Continuous Positive Airway Pressure RC705-779 business.industry Construct validity Sleep apnea medicine.disease Apneia obstrutiva do sono respiratory tract diseases Obstructive sleep apnea Blood pressure Walk test Anesthesia Step test Original Article business |
| Zdroj: | Jornal Brasileiro de Pneumologia Jornal Brasileiro de Pneumologia v.46 n.3 2020 Sociedade Brasileira de Pneumologia e Tisiologia (SBPT) instacron:SBPT |
| Popis: | Objective: To evaluate the construct validity and reproducibility of the six-minute step test (6MST) in individuals with obstructive sleep apnea (OSA) treated with continuous positive airway pressure (CPAP). Methods: We evaluated 48 volunteers diagnosed with OSA and treated with CPAP for at least two months. The volunteers underwent the six-minute walk test (6MWT) and the 6MST, in random order and on different days, with an interval of, at most, seven days between the two tests. Results: A moderate positive correlation was found between the distance walked on the 6MWT and the number of steps climbed on the 6MST (r = 0.520; p < 0.001). There was no significant difference between the two 6MSTs in terms of the number of steps climbed (121.7 ± 27.1 vs. 123.6 ± 26.7). Reproducibility for performance on the 6MST and for cardiovascular variables was considered excellent (intraclass correlation coefficient > 0.8). Regarding cardiovascular responses, the 6MST produced higher values than did the 6MWT for HR at six minutes, percent predicted maximum HR, and leg fatigue at six minutes, as well as for systolic blood pressure at six minutes and at one minute of recovery. Conclusions: The 6MST is valid and reproducible, producing greater cardiovascular stress than does the 6MWT. However, the 6MST is also characterized as a submaximal test for the assessment of exercise tolerance in individuals with OSA treated with CPAP. |
| Databáze: | OpenAIRE |
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