Table 3.
Sleep and Sleep Behaviors
| Behavioral Variant FTD | Semantic Dementia | ||||
|---|---|---|---|---|---|
| Characteristic | Statistic | Patients (n = 13) |
Caregivers (n = 13) |
Patients (n = 9) |
Caregivers (n = 9) |
| Bedtime (hours:minutes) | Mean | 9:13 pm | 10:37 pm | 9:50 pm | 10:50 pm |
| SD | 1:21 | 0:57 | 1:19 | 0:39 | |
| Rise time | Mean | 7:23 am | 7:14 am | 7:35 am | 6:45 am |
| SD | 1:13 | 1:00 | 0:41 | 0:20 | |
| Time in bed (hours) | Mean | 9.78a | 8.65a | 10.14b | 8.28b |
| SD | 1.59 | 0.98 | 1.36 | 0.66 | |
| Sleep Duration (hours) | Mean | 9.21 | 8.06 | 9.63 | 7.70 |
| SD | 1.68 | 0.82 | 1.28 | 0.73 | |
| Percentage Sleep | Mean | 88.57 | 86.81 | 89.76 | 86.19 |
| SD | 6.73 | 4.79 | 4.55 | 5.02 | |
| ATSI (Minutes) | Mean | 64.29 | 63.99 | 60.26 | 65.20 |
| SD | 43.14 | 23.01 | 29.55 | 25.34 | |
| Wake Bouts (Number) | Mean | 26.32 | 29.66 | 26.61 | 27.59 |
| SD | 8.69 | 10.30 | 9.73 | 6.75 | |
| Wake Bouts (Duration) | Mean | 2.27 | 2.18 | 2.16 | 27.59 |
| SD | 0.69 | 0.46 | 0.43 | 0.57 | |
Note. FTD = frontotemporal dementia. ATSI = awake time in sleep intervals. Bedtime and rise time were obtained from diary data. Other variables were derived from actigraph recordings.
a
Within-dyad difference is significant (z = 2.67, p = .04).
b
Within-dyad difference is significant (z = 2.06, p = .004).