Table 1.
Mean (Standard Deviation) Age and Sleep Duration Across Developmental Periodsa According to Race/Ethnicity and Sex/Gender From Waves I, III, IV, and V of the National Longitudinal Study of Adolescent to Adult Health, United States, 1994–2018
| Age, Sleep Duration, and Developmental Period | Total (n = 12,593) | Race/Ethnicity and Sex/Gender | |||||
|---|---|---|---|---|---|---|---|
| Black Female (n = 1,525) | Black Male (n = 1,573) | Latinx Female (n = 1,126) | Latinx Male (n = 1,302) | White Female (n = 3,236) | White Male (n = 3,831) | ||
| Age in years | |||||||
| Early adolescence | 13.4 (0.7) | 13.3 (0.7) | 13.4 (0.7) | 13.4 (0.7) | 13.4 (0.7) | 13.4 (0.7) | 13.4 (0.7) |
| Adolescence | 16.7 (1.3) | 16.7 (1.3) | 16.7 (1.3) | 16.7 (1.2) | 16.8 (1.2) | 16.7 (1.3) | 16.6 (1.3) |
| Emerging adulthood | 22.1 (1.3) | 22.1 (1.3) | 22.1 (1.3) | 22.2 (1.3) | 22.4 (1.3) | 22.1 (1.4) | 22.1 (1.3) |
| Young adulthood | 28.7 (1.9) | 28.6 (1.9) | 28.7 (1.9) | 29.0 (1.8) | 29.1 (1.8) | 28.6 (1.9) | 28.7 (1.8) |
| Adulthood | 38.2 (1.8) | 38.1 (1.8) | 38.3 (1.8) | 38.5 (1.7) | 38.6 (1.8) | 37.9 (1.8) | 38.2 (1.8) |
| Sleep duration in hours | |||||||
| Early adolescence | 8.1 (1.1) | 7.8 (1.3) | 7.9 (1.2) | 8.1 (1.1) | 8.0 (1.2) | 8.1 (1.1) | 8.3 (1.0) |
| Adolescence | 7.4 (1.2) | 7.2 (1.3) | 7.3 (1.3) | 7.5 (1.3) | 7.3 (1.2) | 7.4 (1.2) | 7.5 (1.2) |
| Emerging adulthood | 7.3 (1.0) | 7.3 (1.1) | 7.1 (1.2) | 7.2 (1.1) | 7.4 (1.0) | 7.4 (0.9) | 7.2 (1.0) |
| Young adulthood | 7.2 (1.0) | 7.2 (1.1) | 6.8 (1.2) | 7.2 (1.0) | 7.4 (1.0) | 7.5 (0.9) | 7.2 (1.0) |
| Adulthood | 6.6 (1.1) | 6.3 (1.1) | 6.2 (1.1) | 6.5 (1.0) | 6.5 (1.1) | 6.7 (1.0) | 6.6 (1.0) |
a Developmental periods include early adolescence (11–14 years), adolescence (15–19 years), emerging adulthood (20–24 years), young adulthood (25–34 years), and adulthood (35–44 years).