31 For the other six studies, three showed a positive trend favoring the intervention, 30 , 36 , 39 two showed a negative trend, 29 , 34 and one showed no effect. 37 A meta‐analysis of four studies with suitable outcome data, 30 , 31 , 34 , 39 which represented six intervention arms, showed a significant overall effect on BMI z‐score of −0.06 (95% CI [−0.10, −0.01] kg, p = 0.01; four studies, 423 participants [270 intervention group and 153 control group]; I 2 = 0%) favoring the intervention group (Figure 2 ).
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Interventions for the prevention of weight gain during festive and holiday periods in children and adults: A systematic review.
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