Table 3.
Adolescents characteristic with no accelerometer data compared to adolescents with valid accelerometer data, n = 1337 (Initial N = 1296)
| No accelerometer data* | Valid accelerometer data** | p-value | |
|---|---|---|---|
|
Sex, % (n = 1337) |
(n = 205) |
(n = 1132) |
0.011 |
| Girls |
40.5 |
50.1 |
|
| Boys |
59.5 |
49.9 |
|
|
Age, mean year (n = 1337) |
12.7 (n = 205) |
12.6 (n = 1132) |
0.003 |
|
Age groups |
(n = 205) |
(n = 1132) |
0.030 |
|
11-12 years |
65.4 |
72.8 |
|
|
13-14 years |
34.6 |
27.2 |
|
|
BMI, mean kg/m2 (n = 1266) |
19.3 (n = 180) |
18.8 (n = 1086) |
0.016 |
|
Weight status (BMI thresholds)*** (n = 1266): |
(n = 180) |
(n = 1086) |
0.200 |
|
Under-/normal weight |
82.7 |
86.3 |
|
|
Overweight/obese |
17.3 |
13.7 |
|
|
Self-reported PA in leisure time, % (n = 1313): |
(n = 194) |
(n = 1119) |
0.042 |
|
- Performs sports several times a week (vigorous activity) |
47.4 |
45.1 |
|
|
- Doing sport approx. once a week, and besides that physical active every day, cycling, walking, playing (moderate activity) |
19.6 |
28.4 |
|
|
- Enjoy being physical active, but do not attend any sport clubs. Cycle, walk and are physical active when playing (light activity) |
24.7 |
21.0 |
|
|
- Prefer to watch TV, play video games, listening to music or other sedentary behaviour (sedentary) |
8.3 |
5.5 |
|
| Self-reported sedentary leisure time, %: 4 h + of daily sedentary time (TV, computer, reading) in weekdays and weekend days (n = 1313) | 66.0 (n = 194) | 62.3 (n = 1119) | 0.326 |
N varies due to different data sources.
Number of valid days and daily wear time were fixed to 5 days of 10 hours in defining valid data.
*No valid data in any of the non-wear settings. **Valid data when using the 10, 20, 30 or 60/90 minutes of non-wear criterion. ***Age and sex standardized [27].