Table 2.
Within-subject voxelwise whole-brain group average correlations between zMSSD, non-normalized SD, percentage-change normalized MSSD with a mean of 100 (%MSSD), and percentage-change normalized SD with a mean of 100 (%SD)
| Fast TR group |
Slow TR group |
|||||||
|---|---|---|---|---|---|---|---|---|
| zMSSD | SD | %MSSD | %SD | zMSSD | SD | %MSSD | %SD | |
| zMSSD | — | — | — | — | — | — | — | — |
| SD | −0.392 | −0.44 | ||||||
| %MSSD | −0.251 | 0.9811 | −0.314 | 0.9838 | ||||
| %SD | −0.392 | 1 | 0.9811 | −0.439 | 0.9999 | 0.9839 | ||
SD, %SD, and %MSSD are strongly correlated with each other and negatively correlated with zMSSD.