Table 1.
Sample characteristics
| Black | White | Total | |||
|---|---|---|---|---|---|
|
|
|||||
| Mean (SD) | Male | Female | Male | Female | |
| Age (yrs) | 15.7 (1.2) | 15.7 (1.1) | 15.7 (1.5) | 15.6 (1.1) | 15.7 (1.3) |
| Durationb,c | 6.2 (.8) | 6.3 (.6) | 6.4 (.7) | 6.9 (.9) | 6.4 (.8) |
| Fragmentationa,b | 34.4 (10.9) | 31.4 (10.4) | 28.0 (6.7) | 27.0 (8.3) | 30.5 (9.8) |
| Qualityb | 8.9 (1.6) | 8.0 (1.9) | 8.4 (1.8) | 7.7 (1.8) | 8.2 (1.8) |
| Delayed sleep | 12.8 (4.2) | 13.9 (4.6) | 13.3 (3.9) | 13.4 (4.3) | 13.4 (4.3) |
| Daytime Sleepiness | 15.9 (3.9) | 16.3 (3.6) | 15.3 (3.7) | 16.3 (3.4) | 16.0 (3.6) |
| Family Hollingshead Scorea | 33.5 (12.0) | 30.5 (11.6) | 29.0 (11.5) | 27.6 (10.2) | 30.3 (11.5) |
| Body Mass Index percentile | 79.6 (19.8) | 81.3 (19.5) | 80.6 (24.6) | 72.7 (26.8) | 78.7 (22.7) |
| Days physically active ≥ 60 min in last weekb | 4.4 (2.3) | 3.2 (2.3) | 3.9 (1.9) | 2.6 (2.1) | 3.5 (2.3) |
| Daily interpersonal conflict groups N (%)a,b: | |||||
| 0 days | 20 (30.3) | 10 (14.3) | 10 (20.8) | 4 (6.9) | 44 (18.2) |
| < 1/3 days | 20 (30.3) | 19 (27.1) | 14 (29.2) | 9 (15.5) | 62 (25.6) |
| 1/3 – < 2/3 days | 16 (24.2) | 30 (42.9) | 16 (33.3) | 17 (29.3) | 79(32.6) |
| ≥ 2/3 days | 10 (15.2) | 11 (15.7) | 8(16.7) | 28 (48.3) | 57 (23.6) |
| CES-Depression a,b | 12.4 (6.8) | 16.8 (8.5) | 15.5 (9.3) | 21.3 (9.5) | 16.4 (9.0) |
| Coping: | |||||
| Positive Engagement b | 3.4 (0.7) | 3.2 (0.8) | 3.4 (0.7) | 3.1 (0.6) | 3.3 (0.7) |
| Disengagement a,b | 2.7 (0.5) | 2.9 (0.6) | 2.8 (0.6) | 3.1 (0.6) | 2.8 (0.6) |
a
Race main effect, p<.05
b
Gender main effect, p<.05
c
Race x Gender interaction from 2(Race x) 2(Gender) ANOVA, p = .05