Figure 2.

Scatter plots between $\overline{{\mathrm{gmCMRO}}_2}$ and age. (a) Data from all subjects. Each symbol represents data from one subject. Black curve indicates the trend line. $\overline{{\mathrm{gmCMRO}}_2}$ showed a significant increase with age (P=0.03). (b) Data from female subjects only. There was not a significant age effect on $\overline{{\mathrm{gmCMRO}}_2}$. (c) Data from male subjects only. Regression analysis showed that $\overline{{\mathrm{gmCMRO}}_2}$ increases significantly with age (P<0.001).