Table 2.
Actigraphy and PSQI measures across tasks and age groups
| Sleep measures | Younger adults | Older adults | Classic task | Adapted task |
|---|---|---|---|---|
| Actigraphy (hh:mm) | ||||
| Bed time | 23:44 ± 00:09 | 23:23 ± 00:10 | 23:37 ± 00:10 | 23:34 ± 00:10 |
| Sleep start | 00:01 ± 00:09 | 23:35 ± 00:10 | 23:52 ± 00:08 | 23:49 ± 00:12 |
| Sleep end | 07:30 ± 00:07 | 06:33 ± 00:09 | 07:06 ± 00:10 | 07:09 ± 00:09 |
| Get up time | 07:36 ± 00:06 | 06:44 ± 00:08 | 07:17 ± 00:08 | 07:13 ± 00:08 |
| Actual sleep time | 06:24 ± 00:09 | 06:11 ± 00:11 | 06:21 ± 00:09 | 06:16 ± 00:10 |
| Sleep latency | 00:17 ± 00:04 | 00:11 ± 00:03 | 00:15 ± 00:04 | 00:15 ± 00:03 |
| Sleep efficiency (%) | 81.40 ± 1.03 | 84.23 ± 1.69 | 82.94 ± 1.08 | 82.06 ± 1.56 |
| PSQI (0–21) | ||||
| Global score | 3.39 ± 0.29 | 4.47 ± 0.39 | 3.84 ± 0.41 | 3.86 ± 0.28 |
Average values ± SEM for actigraphy and PSQI measures for both task and age groups. Values for actigraphy are reported in hours/percentages as indicated. A global PSQI score greater than 5 suggests poor sleep (Buysse et al., 1989). Although none of the participants here fell under the category of poor sleepers, the older age groups showed increased scores relative to the younger participants.
Key: PSQI, Pittsburgh Sleep Quality Index.