Table 1.
Sleep variable means (standard deviations) for the three sleep conditions.
| Baseline | Short Sleep Opportunity | Healthy Sleep Opportunity | pa | |
|---|---|---|---|---|
| Reported Bedtime | 22:39 (0:27) | 00:18 (0:28) | 21:04 (0:27) | <0.001c |
| Actigraphic Sleep Onset Time | 22:59 (0:32) | 00:28 (0:31) | 21:36 (0:24) | <0.001c |
| Wake Time | 7:04 (0:31) | 7:07 (0:25) | 6:59 (0:26) | 0.58 |
| Actigraphic Sleep Offset Time | 6:59 (0:30) | 7:03 (0:25) | 6:53 (0:25) | 0.67 |
| Time in Bed (TIB) – min | 505.4 (29.0) | 408.6 (16.1) | 596.7 (8.1) | <0.001c |
| Total Sleep Time (TST) – min | 449.2 (38.8) | 377.7 (24.5) | 512.1 (26.1) | <0.001c |
| Sleep Onset Latencyb – min | 13.6 (1.6) | 8.1 (1.4) | 25.3 (1.8) | 0.11 |
| Wake After Sleep Onsetb – min | 26.3 (1.7) | 16.3 (1.6) | 41.3 (1.7) | 0.02d |
| Sleep Efficiency (TST/TIB*100) - % | 88.9 (4.4) | 92.5 (3.6) | 85.8 (4.4) | 0.07 |
Note. Time variables expressed by 24-hour clock, SD expressed in minutes
a
p-value from Type 3 Test for overall difference in three sleep conditions from mixed model with random intercept. Repeated measures accounted for with a Spatial Power covariance structure; means (SDs) are unadjusted and not from model fit.
b
Variable was natural log transformed for mixed model. Geometric means (standard deviation) reported. P-value corresponds to log transformed values.
c
Significant difference across all sleep conditions
d
Significant difference between baseline and short sleep conditions, as well as short and long sleep conditions.