Figure 1

Change of percentage of predicted peak oxygen consumption (A) and peak oxygen pulse (B) as a function of age. The thicker line depicts the mean change in percentage of predicted values as calculated by segmental regression analysis in which slope and intercept are calculated before and after the age of 18 years. The thicker dotted line shows the mean percentage of predicted values in the population according to age calculated by linear regression analysis. Thin dotted lines show patient-specific linear regression lines.