Cross-sectional school-based survey repeated over 12 years on more than 500 kids. In the 2004 the overweight prevalence was 8.8 % than in controls 17.8%. These data suggest that, over a long period of time, interventions targeting a variety of population groups can have synergistic effects on overweight prevalence. These data suggest that, over a long period of time, interventions targeting a variety of population groups can have synergistic effects on overweight prevalence. This gives hope that it is possible to reverse trends towards increasing overweight by actions at the community level.