Table 4.
Means and 95% CI for weekday and weekend sleep duration main effects in race models (hours; year means averaged across race, race means averaged across years)
| Later elementary (Grades 3–5) | Middle school (Grades 6–8) | High school (Grades 9–12) | ||||
|---|---|---|---|---|---|---|
| Weekday | Weekend | Weekday | Weekend | Weekday | Weekend | |
| Year | ||||||
| Pre-change | 9.84 (9.80–9.89) |
10.21 (10.16–10.27) |
8.61 (8.56–8.67) |
9.80 (9.72–9.87) |
7.34 (7.27–7.41) |
9.46 (9.36–9.57) |
| Post-change | 9.62 (9.58–9.66) |
10.19 (10.13–10.24) |
9.09 (9.04–9.14) |
9.75 (9.69–9.82) |
8.12 (8.07–8.17) |
9.40 (9.31–9.48) |
| Follow-up | 9.59 (9.55–9.62) |
10.18 (10.13–10.24) |
9.05 (9.00–9.09) |
9.78 (9.72–9.85) |
7.96 (7.91–8.01) |
9.37 (9.29–9.44) |
| Race | ||||||
| White | 9.81 (9.79–9.84) |
10.22 (10.19–10.25) |
8.98 (8.94–9.01) |
9.81 (9.78–9.85) |
7.86 (7.83–7.90) |
9.43 (9.37–9.50) |
| Black | 9.54 (9.48–9.59) |
10.14 (10.05–10.22) |
8.87 (8.81–8.92) |
9.76 (9.68–9.84) |
7.89 (7.79–7.99) |
9.45 (9.32–9.58) |
| Hispanic | 9.70 (9.66–9.75) |
10.20 (10.14–10.26) |
8.91 (8.86–8.96) |
9.75 (9.68–9.83) |
7.94 (7.88–8.01) |
9.43 (9.33–9.53) |
| Asian | 9.69 (9.63–9.74) |
10.26 (10.18–10.34) |
8.92 (8.87–8.97) |
9.81 (9.72–9.90) |
7.56 (7.49–7.63) |
9.40 (9.27–9.54) |
| MR/AIAN/NHOPI | 9.68 (9.62–9.74) |
10.17 (10.10–10.24) |
8.91 (8.86–8.97) |
9.75 (9.64–9.87) |
7.78 (7.72–7.85) |
9.33 (9.22–9.43) |
The ecological modeling approach was used to obtain results.