Table 2.
Energy-balanced related behaviours of the adolescents participating in the test–retest reliability (n 111) and construct validity studies (n 20), based on calculations from the data of the first measurement; DOiT (Dutch Obesity Intervention in Teenagers) questionnaire. Data are presented as median and 25th percentile, 75th percentile
| Test–retest reliability | Construct validity | |||
|---|---|---|---|---|
| Median | 25th, 75th percentile | Median | 25th, 75th percentile | |
| Soft drink consumption (ml/d) | 886 | 418, 1436 | 657 | 312, 1708 |
| Fruit juice consumption (ml/d) | 247 | 55, 670 | 327 | 166, 686 |
| Consumption of sweets* (portions/d) | 1 | 0, 2 | 1 | 1, 2 |
| Snack consumption (portions/d) | 1 | 0, 2 | 0 | 0, 1 |
| Breakfast frequency (d/week) | 7 | 4, 7 | 7 | 4, 7 |
| Television viewing time (min/d) | 137 | 94, 197 | 133 | 44, 210 |
| Computer time (min/d) | 120 | 56, 180 | 84 | 60, 197 |
| Screen viewing time (min/d) | 274 | 165, 358 | 244 | 120, 324 |
| Active transport (min/school day) | 26 | 16, 36 | 16 | 6, 28 |
| Sport (in clubs) (min/d) | 17 | 0, 43 | 26 | 11, 34 |
| Sport (total)† (min/d) | 43 | 21, 77 | 47 | 28, 67 |
*Including candies, cookies, chocolates and ice cream.
†Including organised (in a club or at school) and unorganised sport activities.