Researchers have identified the three most significant risk factors for child obesity among preschoolers: inadequate sleep a parental BMI that classifies the mom or dad as overweight or obese and parental restriction of a child’s eating in order to control his weight. 'We looked at 22 variables that had previously been identified as predictors of child obesity and the three that emerged as strong predictors did so even as we took into account the influence of the other 19. Their strong showing gives us confidence that these are the most important risk factors to address' Brent McBride from University of