TABLE 1. Prevalence of short sleep duration* on an average school night among middle school students in nine states combined and among nine states and seven large urban school districts, by selected characteristics — Youth Risk Behavior Surveys, 2015.
| Site/Characteristic | No.† | Prevalence % (95% CI) |
|---|---|---|
| Nine state surveys combined§ |
52,356 |
57.8 (56.7–58.9) |
|
Sex
| ||
| Female |
26,549 |
59.6 (58.2–61.0)¶ |
| Male |
25,608 |
56.0 (54.6–57.4)¶ |
|
Grade
| ||
| 6 |
14,060 |
61.3 (59.5–63.0)**,†† |
| 7 |
19,153 |
59.2 (57.8–60.5)§§,†† |
| 8 |
18,707 |
53.1 (51.6–54.7)§§,** |
|
Race/Ethnicity
| ||
| White¶¶ |
23,434 |
56.6 (54.9–58.4)***,††† |
| Black¶¶ |
7,638 |
61.1 (59.0–63.1)§§§,¶¶¶,**** |
| Hispanic |
8,384 |
57.3 (55.3–59.3)***,††† |
| Asian¶¶ |
2,644 |
55.5 (51.0–59.8)***,††† |
| American Indian/Alaska Native¶¶ |
1,302 |
59.4 (55.3–63.4) |
| Native Hawaiian/Pacific Islander¶¶ |
2,075 |
64.2 (59.1–68.9)§§§,¶¶¶,**** |
|
State surveys
| ||
| Delaware |
2,883 |
58.8 (56.7–60.9) |
| Florida |
5,472 |
56.9 (54.9–58.9) |
| Hawaii |
5,704 |
61.3 (57.4–65.0) |
| Kentucky |
1,603 |
64.7 (61.7–67.5) |
| Maine |
4,852 |
53.0 (50.8–55.1) |
| Maryland |
24,938 |
58.7 (57.5–59.9) |
| New Mexico |
2,961 |
50.2 (48.2–52.3) |
| Virginia |
2,133 |
56.3 (53.7–58.9) |
| West Virginia |
1,810 |
64.1 (60.7–67.4) |
|
Large urban school district surveys
| ||
| Broward County, Florida |
1,447 |
62.0 (58.7–65.2) |
| Duval County, Florida |
4,259 |
58.5 (56.7–60.2) |
| Houston, Texas |
2,326 |
58.3 (55.5–60.9) |
| Los Angeles, California |
1,223 |
54.2 (50.8–57.5) |
| Miami-Dade County, Florida |
2,129 |
61.8 (58.9–64.6) |
| Orange County, Florida |
1,799 |
53.1 (50.4–55.8) |
| San Francisco, California | 1,861 | 50.2 (47.0–53.4) |
Abbreviation: CI = confidence interval.
* Short sleep duration defined as <9 hours for students aged 6–12 years and <8 hours for students aged 13–18 years.
† Unweighted number of survey respondents. Categories might not sum to sample total because of missing responses.
§ A combined data set using data from nine state surveys (Delaware, Florida, Hawaii, Kentucky, Maine, Maryland, New Mexico, Virginia, and West Virginia) that is not nationally representative.
¶ Significantly different by sex (p<0.05).
** Significantly different from grade 7 (p<0.05).
†† Significantly different from grade 8 (p<0.05).
§§ Significantly different from grade 6 (p<0.05).
¶¶ Non-Hispanic.
*** Significantly different from black students (p<0.05).
††† Significantly different from Native Hawaiian/Pacific Islander students (p<0.05).
§§§ Significantly different from white students (p<0.05).
¶¶¶ Significantly different from Hispanic students (p<0.05).
**** Significantly different from Asian students (p<0.05).