Table 2 Group differences in sleep-related variables among irregular and regular sleepers.
Irregular | Regular | p-value | Cohen’s d | |
|---|---|---|---|---|
Median (IQR) | ||||
Actigraphy Measures | ||||
Total Sleep Time (minutes) | 954.3 (284.1) | 961.2 (149.2) | 0.604 | 0.089 |
Sleep Midpoint (clock time) | 03:36 am (2:17) | 02:59 am (1:14) | < 10−9 | 0.426 |
Physical Activity (counts in thousands) | 184.3 (108.8) | 229.3 (97.1) | < 10−13 | 0.517 |
Sleep in Clock Day (minutes) | 76.0 (79.2) | 8.9 (18.9) | < 10−20 | 1.543 |
Sleep in Clock Night (minutes) | 410.7 (123.2) | 469.8 (66.2) | < 10−20 | 0.889 |
Daily Light Exposure (minutes > 250 lux) | 85.2 (108.3) | 133.4 (140.8) | < 10−11 | 0.489 |
Self-Report Measures | ||||
ESS | 6 (6) | 4 (5) | < 10−15 | 0.595 |
MEQ | 17 (5) | 18 (5) | < 10−4 | 0.315 |
