Table 4.
Overview of results of the test–retest reliability study and construct validity studies for all participants; DOiT (Dutch Obesity Intervention in Teenagers) questionnaire assessing energy balance-related behaviours
| Reliability (n 111) | Validity (n 20) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Items (section) | No. of items | Range of ICC/κ | Range of % Agree | Excellent | Good | Moderate | Poor | Range of ICC/κ | Range of % Agree | Excellent | Good | Moderate | Poor |
| Consumption of soft drinks (B) | 13 | 0·28–0·74 | 33–81 | – | 8 | 5 | – | 0·12–0·53 | 35–80 | – | 2 | 6 | 5 |
| Consumption of fruit juices (B) | 13 | 0·36–0·75 | 41–94 | 2 | 5 | 6 | – | 0·00–0·45 | 25–100 | 1 | 4 | 4 | 4 |
| Consumption of sweets (C) | 5 | 0·59–0·73 | 37–68 | – | 3 | 2 | – | 0·07–0·60 | 10–33 | – | – | 1 | 4 |
| Consumption of snacks (C) | 7 | 0·46–0·64 | 31–68 | – | 2 | 5 | – | 0·08–0·44 | 15–78 | – | 1 | 2 | 4 |
| Breakfast/meals (D) | 16 | 0·37–0·83 | 84–99 | 8 | 8 | – | – | 0·00–1·00 | 60–100 | 8 | 5 | 3 | – |
| Screen behaviour (E) | 6 | 0·43–0·66 | 29–47 | – | 4 | 2 | – | 0·25–0·73 | 15–45 | – | 2 | 3 | 1 |
| Active transport (F) | 15 | 0·17–0·91 | 64–96 | 9 | 6 | – | – | 0·00–1·00 | 45–100 | 12 | 1 | 2 | – |
| Physical activity (G+H) | 13 | 0·00–0·98 | 37–99 | 6 | 6 | 1 | – | 0·07–0·96 | 28–100 | 5 | 3 | 2 | 3 |
| Having a job (I) | 7 | 0·66–1·00 | 89–100 | 7 | – | – | – | 0·00–1·00 | 95–100 | 7 | – | – | – |
| Overall | 95 | 0·00–1·00 | 29–100 | 32 (34 %) | 42 (44 %) | 21 (22 %) | – | 0·00–1·00 | 10–100 | 33 (35 %) | 18 (19 %) | 23 (24 %) | 21 (22 %) |
ICC, intraclass correlation coefficient; κ, Cohen's kappa coefficient; % Agree, percentage agreement.