Table 1.
Characteristics of the control group and intervention group at baseline
| Control (n = 1105) | Intervention (n = 1296) | P-value | n (control / intervention) | |
|---|---|---|---|---|
| Male gender (%) | 48.8 | 51.1 | 0.261 | 1105/1296 |
| Age (years) | 10.9 (0.63) | 11.0 (0.64) | 0.023 | 981 / 1268 |
| Weight (kg) | 41.21 (8.83) | 40.55 (9.24) | 0.107 | 891 / 1071 |
| Height (cm) | 149.78 (7.69) | 148.57 (7.97) | 0.001 | 892 / 1087 |
| BMI (kg∙m−2) | 18.23 (2.84) | 18.24 (2.93) | 0.973 | 891 / 1070 |
| Overweight (≥25 kg∙m−2) | 17.29 % | 17.37 % | 0.964 | 781 / 1048 |
| Obesity (≥30 kg∙m−2) | 3.84 % | 2.96 % | 0.230 | 781 / 1048 |
| Cardiorespiratory fitness (mL O2∙kg−1∙min−1) | 48.07 (6.78) | 49.41 (6.48) | <0.001 | 862 / 1065 |
| Leisure time physical activitya | 9.2 % 3.3 % 12.7 % | 11.0 % 3.9 % 15.0 % | 0.234 | 818 / 1117 |
| 26.2 % 48.7 % | 23.8 % 46.2 % | |||
| Long term school cyclingb | 60.6 % 21.2 % 18.2 % | 54.8 % 25.8 % 19.4 % | 0.026 | 817 / 1117 |
| Cycling last week beyond school cyclingc | 37.7 % 43.0 % 19.3 % | 31.7 % 43.1 % 25.3 % | 0.002 | 817 / 1117 |
| School cycling trips last week (total number to and from school) | 6.4 (4.3) | 5.8 (4.4) | 0.002 | 813 / 1113 |
Data are means (SD) or numbers in percent. P-values are for differences in distributions (Chi-squared tests) or differences in continuous outcomes (t-tests) between the control group and the intervention group
aFrom the least to the most physically active category (cf. Method section)
bCategories are: Always or almost always/Sometimes/Never or hardly ever”, respectively
cOften or very often/Sometimes/Seldom or not at all
Study conducted at three different locations in Denmark, 2010–2011