Table 2.
Sleep Characteristics
| Black (N=139) | White (N=105) | Total (N=244) | |
|---|---|---|---|
| Mean (SD) major sleep duration in hours *** | 5.46 (1.1) | 6.29 (1.2) | 5.82 (1.2) |
| N (%) | |||
| <5hr | 46 (33.3) | 15 (14.3) | 61 (25.1) |
| 5 – 5.99 hr | 48 (34.8) | 23 (21.9) | 71 (29.2) |
| 6 – 6.99 hr | 35 (35.4) | 42 (40.0) | 77 (31.7) |
| 7 – 7.99 hr | 8 (5.8) | 18 (17.1) | 26 (10.7) |
| 8hr + *** | 1 (0.7) | 7 (6.7) | 8 (3.3) |
| Mean (SD) 24 hour sleep duration in hours *** | 6.02 (1.1) | 6.87 (1.4) | 6.38 (1.3) |
| N (%) | |||
| <5hr | 22 (15.8) | 7 (6.7) | 29 (11.9) |
| 5 – 5.99 hr | 54 (38.8) | 18 (17.1) | 72 (29.5) |
| 6 – 6.99 hr | 39 (28.1) | 39 (37.1) | 78 (32.0) |
| 7 – 7.99 hr | 18 (12.9) | 24 (22.9) | 42 (17.2) |
| 8hr + *** | 6 (4.3) | 17 (16.2) | 23 (9.4) |
| Mean (SD) awake after sleep onset in minutes* | 68.40 (27.6) | 61.20 (24.0) | 65.30 (26.3) |
| Median (IQR) * | 65.43 (30.6) | 58.00 (30.3) | 61.14 (29.9) |
| Mean (SD) Perceived sleep quality | 2.28 (0.7) | 2.21 (0.5) | 2.25 (0.6) |
| Less Sleep/Trouble Sleeping at age 7 | 0.11 (0.28) | 0.13 (0.30) | 0.12 (0.29) |
| Sleep More/Nightmares at age 7 | 0.22 (0.31) | 0.15 (0.29) | 0.19 (0.31) |
*
p<.05
**
p<.01
***
p<.001 race differences from t-tests.
Note perceived sleep quality based on 225 men.