Poor inspiratory muscle performance significantly relates to greater anxiety in patients with COPD

Formiga, Magno F.; Campos, Michael; Cahalin, Lawrence P.; Balestrini, Kira; Bagley, Valeria; Luna, Landy

doi:10.1183/1393003.congress-2017.pa2010

Cited by 1 publication

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“…Pilot studies indicate that SMIP and ID have the potential to be clinically relevant tools in COPD, even more so than the traditional quasistatic MIP. 16 – 18 However, evidence on the reliability and validity of these measurements in COPD is not currently available. Therefore, the purpose of this study was to assess the test–retest reliability, responsiveness and construct validity of the MIP, SMIP and ID as measures of inspiratory muscle performance in subjects with obstructive lung disease.…”

Section: Introductionmentioning

confidence: 99%

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

Formiga¹,

Roach²,

Vital³

et al. 2018

COPD

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PurposeThe 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 methodsTest–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.ResultsAll 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.ConclusionThe TIRE measures of MIP, SMIP and ID have excellent test–retest reliability and demonstrated known-groups validity in subjects with COPD. SMIP and ID also demonstrated evidence of moderate convergent validity and appear to be more stable measures in this patient population than the traditional MIP.

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Section: Introductionmentioning

confidence: 99%