Table 1.
Diurnal parameters of sleep measures, alertness, CBT, and melatonin during the USW procedure aligned by the time since lights on
| Sleep recording | Variables aligned on lights on | |||||
| Mesor | Amplitude | Acrophase, h | ||||
| Women | Men | Women | Men | Women | Men | |
| SE, % | 48.9 ± 1.8 | 45.5 ± 1.6 | 33.4 ± 1.9 | 31.3 ± 1.8 | 22.3 ± 0.2* | 0.0 ± 0.2* |
| SOL, min | 29.4 ± 12.8 | 28.3 ± 11.0 | 20.0 ± 1.2 | 17.9 ± 1.1 | 10.4 ± 0.2* | 12.1 ± 0.2* |
| ROL, min | 49.5 ± 10.1 | 49.2 ± 8.7 | 10.1 ± 1.3 | 12.2 ± 1.2 | 11.1 ± 0.5* | 12.9 ± 0.4* |
| Stage 1, min | 2.7 ± 0.3* | 3.9 ± 0.3* | 1.2 ± 0.2* | 2.3 ± 0.2* | 23.3 ± 0.6* | 1.4 ± 0.3* |
| Stage 2, min | 17.7 ± 1.1* | 12.5 ± 1.0* | 10.0 ± 0.8 | 8.0 ± 0.8 | 22.7 ± 0.3* | 0.3 ± 0.4* |
| SWS, min | 3.8 ± 0.6* | 6.6 ± 0.5* | 3.0 ± 0.6 | 3.5 ± 0.6 | 19.6 ± 0.8* | 21.9 ± 0.6* |
| REM, min | 8.0 ± 1.8 | 4.3 ± 0.5 | 6.3 ± 0.7 | 6.0 ± 0.7 | 22.1 ± 0.4* | 0.4 ± 0.5* |
| NREM, min | 24.1 ± 8.2 | 22.8 ± 7.0 | 13.5 ± 1.1 | 13.1 ± 1.1 | 22.1 ± 0.3* | 23.9 ± 0.3* |
| TST, min | 29.2 ± 8.7 | 27.3 ± 7.5 | 20.1 ± 1.1 | 18.8 ± 1.1 | 22.3 ± 0.2* | 0.0 ± 0.2* |
| Alertness, 0–10 | 6.4 ± 0.3 | 7.1 ± 0.3 | 1.8 ± 0.1* | 1.2 ± 0.1* | 9.5 ± 0.3* | 11.7 ± 0.4* |
| CBT, °C | 37.13 ± 0.04 | 37.08 ± 0.04 | 0.31 ± 0.01 | 0.30 ± 0.01 | 9.0 ± 0.1* | 10.1 ± 0.1* |
| Melatonin, pg/mL | 10.7 ± 2.3 | 10.0 ± 1.6 | 4.9 ± 0.7 | 4.9 ± 0.5 | 19.7 ± 0.5 | 20.2 ± 0.4 |
Women were studied during their MF phase.
*
Sex difference (P < 0.05).