Exercise Capacity in Unilateral Diaphragm Paralysis: The Effect of Obesity

Figure 2

CPET parameters in matched UDP and non-UDP subjects, with and without obesity. Box plot showing the interquartile range, median, min, max, and possible outliers. UDP= unilateral diaphragm paralysis; OB= obesity. Outliers are indicated as dots on the figure. p-values based on stratified linear regression. Panel (a): VO2 at peak exercise, as percent predicted referenced to actual body weight. Panel (b): VO2 at peak exercise, as percent predicted referenced to ideal body weight. Panel (c): (PWR, watts) = 9.81(mvi)/100, where m is mass (kg); v is velocity (m/sec); i is treadmill %incline. Panel (d): total exercise time, minutes.

(a) VO2Max %predABW

(b) VO2Max %predIBW

(c) Estimated peak work rate

(d) Exercise time