Table 1 Baseline scores for background characteristics and differences between control (n = 758) and experimental condition (n = 1117)
| Â | Total group Uncorrected % | Control condition Uncorrected % | Experimental condition Uncorrected % | Odds ratio (CI) baseline difference 1 |
|---|---|---|---|---|
Gender | Â | Â | Â | 1.024 |
- Boys | 52.3 | 42.2 | 51.4 | (0.831-1.263) |
- Girls | 47.7 | 57.8 | 48.6 | Â |
Ethnicity | Â | Â | Â | 0.987 |
- Dutch | 80.4 | 81.8 | 79.4 | (0.756-1.289) |
- Other | 19.6 | 18.2 | 20.6 | Â |
Year | Â | Â | Â | 2.617* |
- First year | 41.1 | 50.9 | 34.4 | (1.050-6.523) |
- Second year | 58.9 | 49.1 | 65.6 | Â |
Educational track | Â | Â | Â | 3.597** |
- Theoretical subtracks of prevocational education and senior general education (higher subtracks) | 65.9 | 50.5 | 76.3 | (1.412-9.161) |
- Practical subtrack of prevocational education (lower subtrack) | 34.1 | 49.5 | 23.7 | Â |
| Â | Total group Uncorrected mean (SD) | Control condition Uncorrected mean (SD) | Experimental condition Uncorrected mean (SD) | t -test (CI) baseline difference |
Mean factor score for socio-economic position (SD) (range -4 to 4) | -0.04 (0.86) | -0.01 (0.91) | -0.04 (0.86) | 1 (0.874-1.145) |