Table 3.
Children's sleep duration
| Sleep duration variable, hh : mm (weighted means) | Whole sample | Low SES group | High SES group |
|---|---|---|---|
| Nighttime sleep duration, mean (SD)a | 11:12 (0:38) | 11:09 (0:36) | 11:16 (0:40) |
| Daytime sleep duration, median (interquartile range)b | 0:01 (0:21) | 0:09 (0:29) | 0:00 (0:08)** |
| Total sleep duration over 24 h, mean (SD)a | 11:24 (0:35) | 11:26 (0:30) | 11:22 (0:40) |
a
Comparison between socioeconomic groups by independent samples t-test.
b
Comparison between socioeconomic groups by Mann–Whitney U test.
**
p ≤ .01.