Minimal Clinically Important Differences in the Six-Minute Walk Test and the Incremental Shuttle Walking Test

摘要: Simple walking tests are widely used for the assessment of functional status in patients with cardiorespiratory disorders. These require far less instrumentation than formal cardiopulmonary exercise tests, but they do standardization procedures to achieve reproducible results. The most COPD 6-minute test (6MWT) and incremental shuttle (SWT). 6MWT has been characterized respect reproducibility responsivity change health status. results correlated pulmonary function, health-related quality life, maximum capacity, mortality. minimal clinically important difference (MCID) is conservatively estimated be 54-80 meters using both distributional discriminative methods. For an individual patient, would need by about 86 statistically confident that there a change. SWT extensively validated 6MWT, similar (CV = approximately 20%). improve rehabilitation bronchodilation, highly oxygen consumption. There no studies address issue MCID SWT. In addition MCID, design interpretation clinical trials should take into account severity initial impairment, asymmetry between positive negative changes, proportion who show substantial improvement, costs risks treatment.