• Su Zhan, Frank J Cerny, William J Gibbons, M Jeffery Mador, and Yow-Wu Wu.
• SUNY Buffalo, NY, USA.
• J Cardiopulm Rehabil. 2006 May 1;26(3):180-7; discussion 188-90.

BackgroundUnsupported arm exercise tests have been used to evaluate the effects of pulmonary rehabilitation in patients with chronic obstructive pulmonary disease (COPD), but the reliability and validity of these tests are not established.ObjectiveWe evaluated the test-retest reliability and validity of a 6-minute pegboard and ring test (PBRT) in 27 outpatients with COPD and 30 age-matched controls.MethodsWe evaluated a 6-minute PBRT, subject demographics, pulmonary function and disease-specific quality of life questionnaire, and the Pulmonary Functional Status Dyspnea Questionnaire-Modified version in 27 patients with COPD.ResultsHighly significant correlation coefficients (r = .91, P < .001) were found between test and retest of PBRT scores. Statistically significant correlation coefficients were found between PBRT scores and pulmonary function tests such as FEV1% pred and FVC% pred, and activity domain and subdomain of Pulmonary Functional Status Dyspnea Questionnaire-Modified (P ConclusionPBRT is a reliable and valid method to assess unsupported arm exercise endurance in patients with COPD.

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