Table A1.
Overview of proportion of studies finding disparities in various aspects of sleep
| Duration | Sleep/wake problems | Bedtime | Wake time | Sleepiness | Efficiency | Variability in duration | Quality | Fragmentation | |
|---|---|---|---|---|---|---|---|---|---|
| All studies, N = 23 | |||||||||
| Studies that found disparities | 17 | 6 | 5 | 2 | 0 | 1 | 1 | 0 | 1 |
| Total studies | 18 | 8 | 5 | 4 | 1 | 1 | 1 | 1 | 1 |
| Percentage | 94.44 | 75.00 | 100.00 | 50.00 | 0.00 | 100.00 | 100.00 | 0.00 | 100.00 |
| Studies using objective instruments, n = 6a | |||||||||
| Studies that found disparities | 5 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 |
| Total studies | 5 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Percentage | 100.00 | 0.00 | 100.00 | 0.00 | 0.00 | 100.00 | 100.00 | 0.00 | 100.00 |
| Studies using self- or parent-reports, n = 19b | |||||||||
| Studies that found disparities | 14 | 6 | 4 | 2 | 0 | 0 | 0 | 0 | 1 |
| Total studies | 15 | 8 | 4 | 3 | 1 | 0 | 0 | 1 | 1 |
| Percentage | 93.33 | 75.00 | 100.00 | 66.67 | 0.00 | 0.00 | 0.00 | 0.00 | 100.00 |
| Studies of children only, n = 3 | |||||||||
| Studies that found disparities | 3 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total studies | 3 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
| Percentage | 100.00 | 0.00 | 100.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Studies of adolescents only, n = 10 | |||||||||
| Studies that found disparities | 7 | 2 | 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| Total studies | 8 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Percentage | 87.50 | 66.67 | 100.00 | 100.00 | 0.00 | 100.00 | 100.00 | 0.00 | 100.00 |
| Studies of children and adolescents, n = 10 | |||||||||
| Studies that found disparities | 7 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
| Total studies | 7 | 4 | 2 | 2 | 0 | 0 | 0 | 0 | 0 |
| Percentage | 100.00 | 100.00 | 100.00 | 50.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
a
All sleep variables were not necessarily measured by objective instruments.
b
All sleep variables were not necessarily measured by self-or parent-reports.