Table 1.
Demographic and Sleep Characteristics of the Sample of Subjects With Scores on at Least One Game.
| n/% N = 512823 | Self-reported sleep duration M (SD) | |
|---|---|---|
| Gender | ||
| Male | 186577 (36.4) | 6.9 (1.4) |
| Female | 326245 (63.6) | 6.9 (1.4) |
| Age (years) | ||
| 15–24 | 183664 (35.8) | 7.2 (1.5) |
| 25–34 | 100988 (19.7) | 6.9 (1.4) |
| 35–44 | 71830 (14.0) | 6.7 (1.4) |
| 45–54 | 75819 (14.8) | 6.7 (1.3) |
| 55–64 | 54136 (10.6) | 6.8 (1.3) |
| 65–74 | 21263 (4.2) | 6.9 (1.3) |
| 75–89 | 5123 (1.0) | 7.0 (1.3) |
| Education level | ||
| Other | 20374 (4.0) | 7.0 (1.6) |
| Some HS | 35272 (6.9) | 6.9 (1.6) |
| HS diploma | 106430 (20.8) | 7.0 (1.5) |
| Some college | 125865 (24.5) | 6.8 (1.5) |
| Associate degree | 33118 (6.5) | 6.8 (1.4) |
| Bachelor’s degree | 101804 (19.9) | 6.9 (1.3) |
| Master’s degree | 46721 (9.1) | 7.0 (1.2) |
| PhD/Professional | 43239 (8.4) | 7.0 (1.3) |
Due to the large sample size, all pairwise comparisons of mean sleep duration for gender, age, and education level are statistically significant, even when effect sizes are negligible.