Table 1.
Characteristics of the study population (n = 255).
| n (%) | |
|---|---|
| Gender; n boys (missing n = 0) | 117 (45.9%) |
| Age; mean years (SD) (missing n = 0) | 12.1 (0.5) |
| Valid measurement-days; n ≥ 3 days (missing n = 0) | 189 (74.1%) |
| Respondent questionnaire; n mothers (missing n = 54 (21.2%)) | 146 (57.3%) |
| Most frequently used transport mode to school; n bicycling (missing n = 59 (23.1%)) | 128 (50.2%) |
| Most frequently used transport mode to school; n walking (missing n = 59 (23.1%)) | 52 (20.4%) |
| Average daily time spent on homework during measurement; n ≤ 10 min (missing n = 59 (23.1%)) | 150 (58.8%) |
| Standardized mean of social economic status score of the neighbourhood (SD) 1 (missing n = 0) | 0.06 (1.31) |
Missing values indicate participants that provided valid GPS and accelerometer data but did not fill in the questionnaire. 1 Compared to the National Dutch average, based on the respondent’s postcode area, including the average income per household and the percentages of households with low income, without a paid job and with a lower educational level.