The intervention was effective for three out of nine of the secondary outcomes after multiple testing was taken into account : self reported time spent in screen viewing at the weekend ( -21 ( -37 to -4 ) minutes per day ) , self reported servings of snacks per day ( -0.22 ( -0.38 to -0.05 ) ) , and servings of high energy drinks per day ( -0.26 ( -0.43 to -0.10 ) ) were all reduced .