Good repeatability ( for the 6MWT and ESWT ) and reproducibility ( for the 6MWT , 12-minute walk test , ISWT , ESWT , and incremental cycle ergometer test ) were reported by most studies assessing these tests , providing patients were familiarized with them beforeh and .
The 6MWT , ISWT , and particularly the ESWT were reported to be sensitive to therapeutic intervention .
Exercise tests are often used to evaluate the functional status of patients with COPD .
However , to the best of our knowledge , a comprehensive systematic comparison of these tests has not been performed .
We systematic ally review ed studies reporting the repeatability and /or reproducibility of these tests , and studies comparing their sensitivity to therapeutic intervention .
Lung-volume reduction surgery for pulmonary emphysema: Improvement in body mass index, airflow obstruction, dyspnea, and exercise capacity index after 1 year.
OBJECTIVES We hypothesized that lung-volume reduction surgery for pulmonary emphysema would improve body mass index , airflow obstruction , dyspnea , and exercise capacity ( BODE ) index , a multidimensional predictor of survival in chronic obstructive pulmonary disease . We also aim ed to identify preoperative predictors of improvement in the BODE index . METHODS In a prospect i ve cohort study of patients undergoing lung-volume reduction surgery at our center , with the methodology of the National Emphysema Treatment Trial , we compared clinical characteristics before and 1 year after surgery with the Wilcoxon signed rank test . Changes in the BODE index were correlated with preoperative variables with the Spearman correlation coefficient . RESULTS Twenty-three patients with predominantly upper-lobe pulmonary emphysema underwent lung-volume reduction surgery  ( 14 by video-assisted thoracoscopic surgery , 9 by median sternotomy ) . There were no postoperative or follow-up deaths . The BODE index improved from a median of 5 ( interquartile range 4 - 5 ) before surgery to 3 ( interquartile range 2 - 4 ) 1 year after surgery ( P < .0001 ) . Improvements were seen in the lung function and dyspnea components of the BODE index . Lower preoperative 6-minute walk distance and lower postwalk Borg fatigue scores were each associated with greater improvement in the BODE index after 1 year . CONCLUSION Lung-volume reduction surgery for pulmonary emphysema improved the BODE index in patients with predominantly upper-lobe disease . Lower preoperative 6-minute walk distance correlated with greater improvement in the BODE index
Good repeatability ( for the 6MWT and ESWT ) and reproducibility ( for the 6MWT , 12-minute walk test , ISWT , ESWT , and incremental cycle ergometer test ) were reported by most studies assessing these tests , providing patients were familiarized with them beforeh and .
The 6MWT , ISWT , and particularly the ESWT were reported to be sensitive to therapeutic intervention .
Exercise tests are often used to evaluate the functional status of patients with COPD .
However , to the best of our knowledge , a comprehensive systematic comparison of these tests has not been performed .
We systematic ally review ed studies reporting the repeatability and /or reproducibility of these tests , and studies comparing their sensitivity to therapeutic intervention .