Figure 5.

Comparison of $\overline{{\mathrm{gmCMRO}}_2}$ by groups based on acquisition time of the day. ANOVA analysis using all three groups revealed a significant group difference (P=0.023). Post-hoc test showed that $\overline{{\mathrm{gmCMRO}}_2}$ at noon was significantly higher than that in the morning (P=0.022). Note that the $\overline{{\mathrm{gmCMRO}}_2}$ values used in this analysis have factored out the age and sex effects, by using the age/sex regression equation. Thus, this analysis examines the residual variance of $\overline{{\mathrm{gmCMRO}}_2}$ across subjects.