Can school-based, health behavioural interventions tackle health inequities in childhood?

Abstract

Abstract Background To improve the health situation of children in primary school, many school-based interventions that are aimed at changing health behaviours, are being set up. Prior to knowing the (long-term) effectiveness of such intervention, we set out to examine whether there is room for such interventions to also tackle the health gap between children from high and low socioeconomic backgrounds. Methods Data from the Dutch quasi-experimental Health Primary School of the Future were used. All children from eight primary schools were included in the period 2015-2019. In the first cross-sectional phase, we studied whether there were socioeconomic differences in various health outcomes (e.g. body mass index) and whether these were smaller in children in the oldest groups (highest classes). In a two-year longitudinal approach, it was studied how socioeconomic differences in health outcomes developed in two years time and whether health behaviours could “explain” any socioeconomic differences in the outcomes. Linear and logistic regression analyses were used, including multilevel variants thereof, as well as mediation analyses. Results Both the cross-sectional and longitudinal analyses indicated substantial and consistent socioeconomic differences in various health outcomes. The socioeconomic differences in health appeared stronger in the oldest children (highest classes). Due to only small socioeconomic differences in health behaviours, such behaviours did not mediate the socioeconomic differences in the children's health outcomes. Conclusions The findings indicate substantial socioeconomic differences in health in primary school. That being longer at school did not attenuate the socioeconomic differences in health and that health behaviours did not mediate the socioeconomic differences in health suggests that there might not be much room for school-based, health behaviour interventions to easily tackle socioeconomic differences in health in childhood. Key messages We found substantial socioeconomic differences in child health in the Netherlands. But we found only little evidence that primary school-based, health behavioural interventions will easily tackle socioeconomic differences in child health.