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Sample characteristics.
| Gender | Country | n | Age (years) |
Weight (kg) |
Height (cm) |
PA (METs-min/day) |
Sitting (min/day) |
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | M | SD | M | SD | M | SD | |||
| Boys | Czech Republic | 705 | 16.6 | 1.2 | 68.7 | 12.5 | 177.9 | 8.6 | 803 | 578 | 382 | 123 |
| Poland | 853 | 16.3 | 0.7 | 67.7 | 12.7 | 176.8 | 7.6 | 879 | 604 | 367 | 151 | |
|
| ||||||||||||
| Girls | Czech Republic | 1444 | 16.8 | 1.2 | 59.1 | 9.2 | 167.1 | 6.7 | 679 | 508 | 395 | 118 |
| Poland | 1074 | 16.3 | 0.7 | 56.9 | 8.6 | 165.9 | 6.1 | 773 | 556 | 371 | 143 | |
M: mean; SD: standard deviation; PA: physical activity.
