Table 1.
Characteristics of study participants.
| Characteristic | All (N=20) | Control Sleep First (n=11) | Sleep Restriction First (n=9) |
|---|---|---|---|
| Age, years | 23.4 (4.8) | 23.5 (3.8) | 23.2 (6.1) |
| Male, n | 11 (55) | 6 (55) | 5 (56) |
| Body mass index, kg/m2 | 24.5 (3.5) | 24.7 (3.3) | 24.3 (4.0) |
| Race/Ethnicity | |||
| White | 15 (75) | 7 (64) | 8 (89) |
| Black/African-American | 2 (10) | 2 (18) | 0 (0) |
| Other* | 3 (15) | 2 (18) | 1 (11) |
| Contraceptive use, n | 6 (67) | 2 (40) | 4 (100) |
| Caffeine consumption, cups/day | 1 (1) | 1.1 (1.3) | 0.8 (1.5) |
| Alcohol consumption, drinks/week | 1 (2) | 0.7 (1.1) | 1.6 (2.9) |
| Habitual sleep duration, h | 8 (1) | 7.9 (0.8) | 7.7 (1.2) |
| Apnea-hypopnea index, event/h | 0.5 (0.7) | 0.4 (0.9) | 0.6 (0.4) |
| Beck Depression Inventory | 2.8 (3.2) | 1.4 (1.5) | 4.6 (3.8) |
Data are expressed as mean (SD) and number (percentage).
*
One mixed race Native American/White, one mixed race African-American/White, one mixed race Hispanic/White.