Table 1 Descriptive characteristics of the study population and times spent in sedentary behaviors
| 听 | Number | Percent |
|---|---|---|
Overall | 625 | 100.0 |
Okayama in 2010 | 303 | 48.5 |
Tokyo in 2014 | 322 | 51.5 |
Sex | ||
鈥僊补濒别 | 330 | 52.8 |
鈥僃别尘补濒别 | 295 | 47.2 |
Grade level | ||
鈥僉ower grades | 173 | 27.7 |
鈥僅igher grades | 452 | 72.3 |
Body mass index (kg/m2) | ||
鈥僊ean听卤听SD | 16.9听卤听2.7 | |
鈥僙 score (median, 25 to 75%ile) | 鈭�0.19, 鈭�0.65 to 0.40 | |
Sedentary time, min/week | ||
鈥僕别别办诲补测蝉 | Mean听卤听SD | |
鈥冣�僐eading or listening to music | 90.3听卤听123.4 | |
鈥冣�僒V or video viewing | 535.0听卤听356.6 | |
鈥冣�僒V game use | 167.3听卤听222.1 | |
鈥冣�僀omputer use excluding class | 23.9听卤听70.9 | |
鈥冣�僁oing homework or assignments | 264.9听卤听185.3 | |
鈥冣�僀ar travel | 33.4听卤听61.2 | |
鈥僕别别办别苍诲蝉 | Mean听卤听SD | |
鈥冣�僐eading or listening to music | 42.1听卤听70.0 | |
鈥冣�僒V or video viewing | 323.9听卤听232.0 | |
鈥冣�僒V game use | 123.0听卤听96.4 | |
鈥冣�僀omputer use excluding class | 15.8听卤听49.9 | |
鈥冣�僁oing homework or assignments | 74.4听卤听96.4 | |
鈥冣�僀ar travel | 71.3听卤听84.9 | |
Physical activitya, number of days/week | ||
鈥僊ean听卤听SD | 3.0听卤听2.2 | |
鈥僙 score (median, 25 to 75 percent tile) | 鈭�0.12, 鈭�0.82 to 0.77 | |