Abstract
Background: This study aims to assess the correlation between maximal oxygen uptake (peakVO2) during cardiopulmonary exercise test (CPET) and peakVO2 obtained from incremental shuttle walking test (ISWT) in patients with chronic obstructive pulmonary disease (COPD) and to investigate their relationship with quality of life. Methods: Data of 38 stable COPD patients (35 males, 3 females; mean age 64.6±8.3 years; range 48 to 82 years) who completed outpatient pulmonary rehabilitation (PR) program and assessed by CPET and ISWT through treadmill test was retrospectively analyzed. Pulmonary rehabilitation was performed during eight weeks. PeakVO2 measured via breath-by-breath technique during CPET. PeakVO2 from ISWT distance was calculated by the formula “4.19+ [0.025x ISWT distance]”. Borg scale was used for the evaluation of dyspnea severity before and after PR, whereas St. George’s Respiratory Questionnaire was used for quality of life. Results: PeakVO2 on CPET were found 15.9±5.1 ml/min/kg before PR and 17.3±5.3 ml/min/kg after PR (p=0.001). The peakVO2 calculated with ISWT was 11.6±3.2 m l/min/kg before PR and 13.4±3.2 ml/min/kg after PR (p
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