From: REM sleep is associated with the volume of the cholinergic basal forebrain in aMCI individuals
 | Full sample (n = 62) | Cognitively unimpaired (n = 31) | aMCI (n = 31) | T or χ2 | P |
---|---|---|---|---|---|
Demographics and cognition | |||||
 Age: years | 67.6 ± 8.1 | 66.8 ± 7.2 | 68.3 ± 8.8 | -0.74 | p = 0.46 |
 Sex: number (%) of women | 20 (32.3) | 13 (41.9) | 7 (22.6) | 2.66 | p = 0.10 |
 Education: years | 14.5 ± 3.5 | 15.3 ± 2.9 | 13.8 ± 4 | 1.71 | p = 0.09 |
 Body mass index: kg/m2 | 25.2 ± 3.4 | 25.2 ± 3.7 | 25.1 ± 3.1 | 0.08 | p = 0.94 |
 Anxiety symptoms: % witha | 9 (14.5) | 4 (12.9) | 5 (16.1) | 0.13 | p = 0.72 |
 Depressive symptoms: % witha | 3 (4.8) | 0 (0) | 3 (9.7) | 3.15 | p = 0.08 |
 MoCA: score b | 26.5 ± 2.7 | 27.8 ± 1.8 | 25.1 ± 2.8 | 4.49 | p < 0.001 |
 RAVLT: Sum of the 5 free recalls | 44.9 ± 12.1 | 53.2 ± 8.0 | 36.6 ± 9.5 | 7.40 | p < 0.001 |
 RAVLT: immediate free recall | 8.9 ± 3.9 | 11.5 ± 2.4 | 6.4 ± 3.4 | 6.84 | p < 0.001 |
 RAVLT: delayed free recalla | 8.5 ± 3.9 | 11.0 ± 2.6 | 5.8 ± 3.2 | 6.98 | p < 0.001 |
Sleep | |||||
 Total Sleep Time: min | 363.8 ± 63.1 | 374.1 ± 62.6 | 353.4 ± 63.0 | 1.30 | p = 0.20 |
 Sleep efficiency: % | 79.5 ± 11.1 | 80.7 ± 11.0 | 78.2 ± 11.3 | 0.88 | p = 0.38 |
 Total sleep AHI: Nb/h | 7.8 ± 9.1 | 7.1 ± 7.6 | 8.5 ± 10.4 | -0.59 | p = 0.56 |
 REM sleep AHI: Nb/h | 5.0 ± 4.5 | 5.5 ± 4.7 | 4.6 ± 4.3 | 0.75 | p = 0.46 |
 NREM-1: min | 59.7 ± 32.6 | 53.9 ± 26.8 | 65.5 ± 37.1 | -1.41 | p = 0.16 |
 NREM-1: % TST | 16.6 ± 8.7 | 14.4 ± 6.6 | 18.7 ± 10.0 | -1.97 | p = 0.054 |
 NREM-2: min | 212.1 ± 54.3 | 222.2 ± 49.7 | 202.1 ± 57.7 | 1.47 | p = 0.15 |
 NREM-2: % TST | 58.0 ± 9.0 | 59.2 ± 8.0 | 56.7 ± 9.8 | 1.12 | p = 0.27 |
 NREM-3: min | 31.9 ± 30.3 | 36.5 ± 35.0 | 27.2 ± 24.4 | 1.21 | p = 0.23 |
 NREM-3: % TST | 9.1 ± 8.8 | 10.3 ± 9.7 | 8.0 ± 7.7 | 1.00 | p = 0.32 |
 REM sleep: min | 60.1 ± 22.9 | 61.6 ± 24.5 | 58.7 ± 21.5 | 0.50 | p = 0.62 |
 REM sleep: % TST | 16.3 ± 5.1 | 16.1 ± 5.1 | 16.6 ± 5.1 | -0.40 | p = 0.69 |
 REM sleep latency: min | 135.1 ± 86.5 | 117.9 ± 74.6 | 152.4 ± 95.1 | -1.59 | p = 0.12 |
 REM sleep efficiency: % | 81.0 ± 12.0 | 80.2 ± 11.7 | 81.8 ± 12.5 | -0.53 | p = 0.60 |
Neuroimaging | |||||
 Total Intracranial volume: cm3 | 1472 ± 122.8 | 1470.1 ± 136.0 | 1474.0 ± 110.3 | -0.12 | p = 0.90 |
 Total BF: mm3 | 417.1 ± 43.9 | 425.2 ± 36.1 | 409.0 ± 49.8 | 1.47 | p = 0.15 |
 Bilateral Ch1-2–3 nuclei: mm3 | 152.6 ± 17.4 | 155.1 ± 16.1 | 150.2 ± 18.5 | 1.14 | p = 0.26 |
 Bilateral Ch4 nuclei: mm3 | 264.5 ± 32.8 | 270.1 ± 25.2 | 258.9 ± 38.6 | 1.35 | p = 0.12 |