Weekday differences in sleep features between Monday (first night) compared with all other weekdays
| Sleep measure | Monday (n=95) | Tuesday (n=94) | p Value | Wednesday (n=94) | p Value | Thursday (n=93) | p Value |
|---|---|---|---|---|---|---|---|
| TST (minutes)* | 440 (5) | 437 (7) | 0.65 | 443 (10) | 0.77 | 449 (10) | 0.32 |
| WASO (minutes)† | 69 (45) | 71 (55) | 0.88 | 67 (59) | 0.72 | 67 (44) | 0.98 |
| Sleep efficiency (%)† | 86.1 (9.3) | 86.3 (10.5) | 0.84 | 87.1 (11.6) | 0.86 | 86.5 (9.6) | 0.70 |
| SOL (minutes)† | 2 (4) | 1 (4) | 0.63 | 2 (4) | 0.36 | 2 (4) | 0.82 |
| Number of awakenings* | 23 (1) | 22 (1) | 0.29 | 21 (1) | 0.07 | 21 (1) | 0.05 |
| Length of awakenings (minutes)† | 3 (1) | 3 (1) | 0.12 | 3 (2) | 0.34 | 3 (1) | 0.11 |
| Sleep onset time | S: 9.1% L: 46.6% E: 44.3% | S: 10.2% L: 54.6% E: 35.2% | S: 9.1% L: 52.3% E: 38.6% |
E=more than 30 min earlier than Monday; L=more than 30 min later than Monday; S=within 30 min of Monday.
*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.