Estimating Maximum Work Rate During Incremental Cycle Ergometry Testing From Six- Minute Walk Distance in Patients With Chronic Obstructive Pulmonary Disease  Kylie Hill, PhD, Sue C. Jenkins, PhD, Nola Cecins, MSc, Danielle L. Philippe, BSc, David R. Hillman, MD, Peter R. Eastwood, PhD  Archives of Physical Medicine and Rehabilitation  Volume 89, Issue 9, Pages 1782-1787 (September 2008) DOI: 10.1016/j.apmr.2008.01.020 Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 1 (A) Regression line and 95% confidence interval for the association between 6MWD and Wmax measured during an incremental cycle ergometry test. Wmax (W)=(0.122×6MWD)+(72.683×height [m])–117.109 (r=.82, standard error of the estimate, 10.8W). (B) Scatter plot of the standardized residuals and values of Wmax (W) estimated using 6MWD and height according to the equation presented in (A). Regression line indicates that the assumption of linearity was met. Archives of Physical Medicine and Rehabilitation 2008 89, 1782-1787DOI: (10.1016/j.apmr.2008.01.020) Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 2 (A) Regression line and 95% confidence interval for the association between 6-minute walk work (6MWW) and Wmax measured during an incremental cycle ergometry test. Wmax (W)=17.393+(1.442×6MWW) (r=.77, standard error of the estimate, 11.8W). (B) Scatter plot of the standardized residuals and values of Wmax (W) estimated using 6MWW according to the equation presented in (A). Regression line indicates that the assumption of linearity was met. Archives of Physical Medicine and Rehabilitation 2008 89, 1782-1787DOI: (10.1016/j.apmr.2008.01.020) Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions