| Model I Empty model | Model II | Model III | Model IV |
---|---|---|---|---|
Fixed effects | Â | Â | Â | Â |
Individual-level variables | Â | Â | Â | Â |
Ethnicity | Â | Â | Â | Â |
   Swedish |  | 1 (reference) | 1 (reference) | 1 (reference) |
   Nordic countries (other than Sweden) |  | 1.37 (0.75-2.50) | 1.41 (0.76-2.62) | 1.39 (0.74-2.61) |
   Other European countries |  | 1.39 (0.86-2.25) | 1.34 (0.82-2.20) | 1.32 (0.83-2.11) |
   Asia |  | 1.57 (1.16-2.13)** | 1.62 (1.18-2.22)** | 1.58 (1.19-2.11)** |
   South America |  | 2.11 (1.24-3-57)** | 2.07 (1.22-3.51)** | 2.03 (1.21-3.38)** |
   Africa |  | 1.07 (0.49-2.34) | 1.16 (0.55-2.45) | 1.13 (0.52-2.46) |
Gender | Â | Â | Â | Â |
   Girl |  |  | 1 (reference) | 1 (reference) |
   Boy |  |  | 1.24 (1.02-1.50)* | 1.24 (1.02-1.50)* |
Age | Â | Â | 0.90 (0.85-0.95)*** | 0.90 (0.85-0.95)*** |
Family structure | Â | Â | Â | Â |
   Living with both parents |  |  | 1 (reference) | 1 (reference) |
   Not living with both parents |  |  | 0.70 (0.60-0.83)*** | 0.70 (0.60-0.83)*** |
Neighbourhood-level variable | Â | Â | Â | Â |
Neighbourhood socioeconomic deprivation | Â | Â | Â | 1.02 (0.92-1.13) |
Random effects | Â | Â | Â | Â |
Between-neighbourhood variance (SE)1 | 0.027 (0.164) | 0.011 (0.105) | 0.005 (0.074) | 0.006 (0.078) |
ICC (%) | 0.8 | 0.3 | 0.2 | 0.2 |
Explained variance (%) | - | 62.5 | 75.0 | 75.0 |