Table 1.
Demographic and subject characteristics by group and sleep dose.
| All Subjects n = 159 | Control 10h TIB n = 17 | Sleep Restricted n = 142 | Recovery Sleep Dose |
||||||
|---|---|---|---|---|---|---|---|---|---|
| 0h TIB n = 13 | 2h TIB n = 27 | 4h TIB n = 29 | 6h TIB n = 25 | 8h TIB n = 21 | 10h TIB n = 27 | ||||
| Age (y)1 | 30.4 ± 7.0 | 29.8 ± 6.8 | 30.6 ± 7.0 | 31.3 ± 7.1 | 32.1 ± 8.2 | 31.9 ± 6.9 | 30.0 ± 6.7 | 29.5 ± 5.9 | 28.7 ± 6.7 |
| Females (%) | 49.1 | 52.9 | 48.6 | 61.5 | 40.7 | 48.3 | 48.0 | 52.4 | 48.1 |
| BMI | 25.1 ± 3.5 | 25.5 ± 3.3 | 24.7 ± 3.6 | 25.0 ± 4.2 | 24.9 ± 3.8 | 24.1 ± 2.8 | 24.5 ± 3.6 | 24.4 ± 4.3 | 25.3 ± 3.5 |
| Caucasian (%) | 36.5 | 17.6 | 38.7 | 53.8 | 40.7 | 41.4 | 36.0 | 38.1 | 29.6 |
| AA2 (%) | 57.2 | 64.7 | 56.3 | 23.1 | 55.6 | 55.2 | 64.0 | 61.9 | 63.0 |
| Hispanic (%) | 3.8 | 5.9 | 3.5 | 15.4 | 3.7 | 3.4 | 0 | 0 | 3.7 |
| Asian (%) | 2.5 | 11.8 | 1.4 | 7.7 | 0 | 0 | 0 | 0 | 3.7 |
| Pre-lab TST (h)1 | 7.9 ± 0.6 | 7.8 ± 0.4 | 8.1 ± 0.7 | 8.3 ± 0.6 | 8.0 ± 0.4 | 8.0 ± 1.0 | 8.2 ± 0.5 | 8.1 ± 0.6 | 8.0 ± 0.7 |
| MEQc1 | 38.9 ± 5.6 | 38.2 ± 5.6 | 39.7 ± 5.6 | 39.2 ± 6.7 | 40.5 ± 5.7 | 40.4 ± 5.3 | 38.2 ± 6.5 | 38.7 ± 5.4 | 40.9 ± 4.9 |
1
Mean ± SD.
2
African American.
BMI, body mass index; Pre-lab TST, actigraph + sleep diary estimated mean nightly sleep duration during the week prior to the laboratory study. MEQc, Morningness-Eveningness Composite Score (all means are intermediate between evening and morning types).26