Table 3.
Correlations of Changes in Sleep on Weekdays with Changes in Sleepiness and Well-Being from Baseline
| Baseline to 1 month | Baseline to 9 months | |||
|---|---|---|---|---|
| r | p | r | p | |
| Change in time in bed | ||||
| KSS score | −0.27 | 0.001 | −0.05 | 0.67 |
| Problems staying awake | −0.17 | 0.05 | −0.05 | 0.65 |
| Refreshed after waking | 0.29 | <0.001 | 0.12 | 0.29 |
| Depression score | −0.18 | 0.04 | −0.27 | 0.02 |
| Positive mood | 0.21 | 0.01 | 0.07 | 0.55 |
| Negative mood | −0.06 | 0.45 | −0.08 | 0.49 |
| Change in total sleep time | ||||
| KSS score | −0.13 | 0.03 | −0.24 | 0.01 |
| Problems staying awake | 0.12 | 0.19 | −0.13 | 0.26 |
| Refreshed after waking | 0.00 | 0.97 | 0.03 | 0.76 |
| Depression score | −0.02 | 0.86 | −0.15 | 0.19 |
| Positive mood | −0.02 | 0.74 | −0.02 | 0.81 |
| Negative mood | 0.05 | 0.45 | −0.16 | .08 |
Bedtime, rise time, time in bed, and measures of sleepiness and well-being were derived from questionnaires, while total sleep time was measured with actigraphy. Significant findings are indicated in bold.