Table 2.
Sleep × fitness (HRRM) interaction for regional brain volume and global cognition.
| Neurocognitive Outcomes | |||
|---|---|---|---|
| Parameter | Hippocampal Volume | Amygdala Volume |
Global Cognition (MMSE) |
| β (95% CI) | β (95% CI) | β (95% CI) | |
| WBL | --- | −0.09 (−0.50, 0.32) | −0.40 (−0.73, −0.07) * |
| WBL × Fitness | −1.36 (−2.45, −0.28) * | −0.74 (−1.98, 0.49) | 0.51 (−0.46, 1.48) |
| WSTP | 0.52 (0.16, 0.89) * | 0.31 (−0.10, 0.72) | 0.33 (−0.06, 0.73) |
| WSTP × Fitness | 0.60 (−0.12, 1.33) | 0.23 (−0.61, 1.08) | −0.44 (−1.17, 0.29) |
| TST | 0.11 (−0.33, 0.55) | 0.40 (−0.03, 0.82) | --- |
| TST × Fitness | −0.15 (−1.07, 0.77) | −0.31 (−1.19, 0.56) | −1.07 (−1.70, −0.43) * |
Note. Significant results are in bold and indicated by the following: * p < 0.05. Main effects were not evaluated for models demonstrating a significant interaction, denoted by the dashed line (---). Abbreviations. TST—total sleep time, WBL—average wake bout length, WSTP—wake-to-sleep transition probability, HRRM—modified heart rate recovery, MMSE—Mini-Mental State Exam, β—standardized beta coefficient, CI—confidence interval.