Table 1. Effect of Bedtime Extension on Actigraphy-Based Sleep Characteristics.
Characteristic | Habitual Bedtimes | Extended Bedtimes | p value |
---|---|---|---|
Sleep duration (hour) | 5.6 (0.1) | 7.1 (0.1) | < 0.001 |
Bedtime duration (hour) | 6.4 (0.2) | 8.2 (0.1) | < 0.001 |
Sleep efficiency (%) | 86.5 (1.4) | 86.5 (1.3) | 0.995 |
Sleep latency (minute) | 8.2 (1.8) | 10.6 (1.7) | 0.282 |
Daytime activity (counts/minute) * | 394 (25) | 423 (24) | 0.020 |
Data are mean (SE)
Calculated as the average activity counts from the wrist actigraphy recordings during the periods when subjects were not in bed to sleep