Reliability and validity of the test of incremental respiratory endurance measures of inspiratory muscle performance in COPD

作者：Magno F. Formiga, Kathryn E. Roach, Isabel Vital, G. Urdaneta, Kira Balestrini, R.A. Calderon Candelario, Michael Campos, Lawrence P. Cahalin · 发表于：International Journal of COPD · 年份：2018 · DOI：10.2147/copd.s160512 · 被引用次数：41 · 研究领域：Chronic Obstructive Pulmonary Disease (COPD) Research、Delphi Technique in Research、Cardiovascular and exercise physiology

Purpose: The Test of Incremental Respiratory Endurance (TIRE) provides a comprehensive assessment of inspiratory muscle performance by measuring maximal inspiratory pressure (MIP) over time. The integration of MIP over inspiratory duration (ID) provides the sustained maximal inspiratory pressure (SMIP). Evidence on the reliability and validity of these measurements in COPD is not currently available. Therefore, we assessed the reliability, responsiveness and construct validity of the TIRE measures of inspiratory muscle performance in subjects with COPD. Patients and methods: Test-retest reliability, known-groups and convergent validity assessments were implemented simultaneously in 81 male subjects with mild to very severe COPD. TIRE measures were obtained using the portable PrO2 device, following standard guidelines. Results: All TIRE measures were found to be highly reliable, with SMIP demonstrating the strongest test-retest reliability with a nearly perfect intraclass correlation coefficient (ICC) of 0.99, while MIP and ID clustered closely together behind SMIP with ICC values of about 0.97. Our findings also demonstrated known-groups validity of all TIRE measures, with SMIP and ID yielding larger effect sizes when compared to MIP in distinguishing between subjects of different COPD status. Finally, our analyses confirmed convergent validity for both SMIP and ID, but not MIP. Conclusion: The TIRE measures of MIP, SMIP and ID have excellent test-retest reliability and demon...