Table 3.
Sleep Characteristics of Randomized Study Participants at Baseline.
| Variable | Overall (N=42) | SIP (N=21) | IC (N = 21) | p-value |
|---|---|---|---|---|
| Objective sleep (actigraphy) | ||||
| Sleep efficiency [M (SD)] | 84.9% (7.9%) | 83.1% (9.3%) | 86.6% (5.9%) | .152 |
| Total sleep time [M (SD)] minutes | 467.6 (86.2) | 459.7 (86.8) | 475.4 (86.9) | .563 |
| Number of nighttime awakenings [M (SD)] | 23.6 (7.9) | 23.3 (8.0) | 23.9 (8.0) | .793 |
| Total nighttime wake time [M (SD)] minutes | 82.6 (43.6) | 93.5 (52.2) | 71.6 (30.3) | .104 |
| Patient-reported sleep | ||||
| PSQI total score [M (SD)] | 6.8 (4.2) | 6.6 (4.2) | 7.0 (4.4) | .721 |
| PSQI factor 1 (sleep efficiency) [M (SD)] | 2.5 (2.3) | 2.7 (2.5) | 2.3 (2.2) | .647 |
| PSQI factor 2 (perceived sleep quality) [M (SD)] | 2.6 (2.1) | 2.1 (1.8) | 3.2 (2.2) | .088 |
| PSQI factor 3 (daily disturbances) [M (SD)] | 1.7 (0.9) | 1.8 (0.9) | 1.5 (0.9) | .310 |
| ISI total score [M (SD)] | 8.5 (6.6) | 8.1 (6.5) | 8.9 (7.0) | .715 |
| PSQI Total sleep time [M (SD)] | 6.6 (2.0) | 6.6 (1.9) | 6.6 (2.0) | .950 |
| PSQI Sleep efficiency [M (SD)] | 73.6 (18.0) | 73.7 (17.4) | 73.6 (19.1) | .981 |
M = mean; SD = standard deviation; PSQI = Pittsburgh Sleep Quality Index; ISI = Insomnia Severity Index.