Mediators of the Effectiveness of an Intervention Promoting Water Consumption in Preschool Children: The ToyBox Study.

The effect of the ToyBox-intervention on preschool children's water consumption was mediated by most family-related determinants examined in this study (ie, availability, parental modeling, parental encouragement, and parental knowledge). Interventions aiming to promote water in preschoolers should target these mediators to enhance their effectiveness.