Table 2.
Mean sleep duration per night, by sex and race/ethnicity
| Adolescence (Ages 13–18) | Emerging Adulthood (Ages 19–22) | Early Adulthood (Ages 23–32) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| n | M | 95% CI | n | M | 95% CI | n | M | 95% CI | |
| Total | 23,134 | 7.71 | 7.70–7.72 | 8,475 | 8.12 | 8.10–8.13 | 20,469 | 8.10 | 8.09–8.11 |
| Sex | |||||||||
| Male | 10,636 | 7.79 | 7.78–7.80a | 3,929 | 7.81 | 7.78–7.83a | 9,646 | 7.86 | 7.85–7.88a |
| Female | 12,498 | 7.63 | 7.62–7.64a | 4,546 | 8.43 | 8.40–8.45a | 10,823 | 8.36 | 8.34–8.37a |
| Race/Ethnicity | |||||||||
| White | 12,500 | 7.78 | 7.77–7.79a,b,c | 4,638 | 8.17 | 8.15–8.20a,b | 10,783 | 8.10 | 8.08–8.11a,b,c |
| African American | 5,031 | 7.54 | 7.52–7.55a,d | 1,846 | 8.10 | 8.06–8.15 | 4,318 | 7.89 | 7.87–7.92a,d |
| Hispanic | 3,560 | 7.72 | 7.70–7.73b,d,e | 1,269 | 8.01 | 7.97–8.05a | 3,391 | 8.38 | 8.35–8.40b,d,e |
| Other | 2,043 | 7.55 | 7.53–7.58c,e | 722 | 7.98 | 7.92–8.04b | 1,977 | 7.93 | 7.89–7.96c,e |
a–f
Significant sex or race/ethnicity differences in mean sleep duration within age group (adolescence, emerging adulthood, and early adulthood). Groups with matching superscripts differed significantly, p < .001.