Weekday differences in sleep features between Tuesday (first night) and all other weekdays
| Sleep measure | Tuesday (n=161) | Wednesday (n=159) | p Value | Thursday (n=159) | p Value |
|---|---|---|---|---|---|
| TST (minutes)* | 452 (5) | 462 (5) | 0.06 | 446 (4) | 0.28 |
| WASO (minutes)† | 64 (39) | 60 (43) | 0.20 | 58 (44) | 0.26 |
| Sleep efficiency (%)† | 87.4 (7.1) | 88.1 (6.9) | 0.07 | 87.7 (8.6) | 0.32 |
| SOL (minutes)† | 2 (4) | 2 (4) | 0.38 | 2 (4) | 0.31 |
| Number of awakenings* | 22 (1) | 21 (1) | 0.33 | 22 (1) | 0.83 |
| Length of awakenings (minutes)† | 3.0 (1.1) | 2.8 (1.3) | 0.16 | 2.8 (1.3) | 0.06 |
| Sleep onset time | S: 15.8% L: 47.5% E: 36.7% | S: 12.2% L: 54.0% E: 33.8% |
E=more than 30 min earlier than Tuesday; L=more than 30 min later than Tuesday; S=within 30 min of Tuesday.
*Data are presented as mean (SE), paired Student's t-test.
†Data are presented as median (IQR), Wilcoxon Signed-rank test.
SOL, sleep onset latency; TST, total sleep time; WASO, wake after sleep onset.