Table 3.
Characteristics of the 15,832 adolescent participants from the 153 Japanese schools that participated in the 2021 Lifestyle Survey of Adolescents.
| Participants | Paper-based (%) | Web-based (%) | χ2 | p | |
|---|---|---|---|---|---|
| N = 15,832 | n = 9,545 | n = 6,287 | |||
| Sex | |||||
| Male | 49.4 | 51.6 | 46.0 | 46.54 | < 0.001 |
| Female | 50.6 | 48.4 | 54.0 | ||
| Grade | |||||
| Junior high school | 366.69 | < 0.001 | |||
| 7 | 17.7 | 16.0 | 20.2 | ||
| 8 | 17.6 | 16.0 | 20.2 | ||
| 9 | 16.7 | 16.0 | 17.6 | ||
| Unknown | 0.2 | 0.4 | 0.0 | ||
| Senior high school | |||||
| 10 | 18.7 | 17.2 | 20.9 | ||
| 11 | 14.5 | 17.0 | 10.8 | ||
| 12 | 14.5 | 17.3 | 10.3 | ||
| Unknown | 0.1 | 0.1 | 0.0 |
Note. p-values were calculated by performing χ2 tests.