1. Course length of 30 metres versus 10 metres has a significant influence on six-minute walk distance in patients with COPD: an experimental crossover study 
Emmylou Beekman, Ilse Mesters, Erik J.M. Hendriks, Mariska P.M. Klaassen, Rik Gosselink, Onno C.P. van Schayck, Rob A. de Bie 
Journal of Physiotherapy 
Volume 59, Issue 3, Pages (September 2013)
DOI: /S (13)
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2. Figure 1
Bland-Altman plot showing systematic lower performance on the six-minute walk test over a 10m-course in patients with COPD. 6MWD = six-minute walk distance. MCID = minimum clinically important disfference.
Journal of Physiotherapy  , DOI: ( /S (13) )
Copyright © 2013 Australian Physiotherapy Association Terms and Conditions

3. Figure 2
Bland-Altman plot showing the difference in %pred 6MWD using a 10m versus 30m course.
%pred 6MWD is based on the average of predicted values from the studies of Gibbons et al (2001), Hill et al (2011), Jenkins et al (2009), and Troosters et al (1999).
6MWD = six-minute walk distance.
Journal of Physiotherapy  , DOI: ( /S (13) )
Copyright © 2013 Australian Physiotherapy Association Terms and Conditions