children ages 7-11 from southwest England divided into 29 clusters.1
randomized to intervention and control groups.
author delivered a program to the intervention groups to discourage
consumption of "fizzy" drinks and promote a balanced, healthy
diet. Program focused on a simple, uncomplicated message to "ditch
the fizz". Took place over 4 one-hour sessions (one per term) throughout
one school year.
measurements taken at 0, 6, and 12 months. Weight and height converted
outcome was BMI for each cluster.
12 months, there was no significant change in the difference in mean
BMI between the two groups (18.3 in control clusters vs. 17.9 in intervention
group (mean difference 0..4; 95%CI:0.2 to 1.0)).
mean percentage of overweight and obese children increased in the control
group by 7.5%, and decreased in the intervention group by 0.2% (mean
difference 7.7%; 95%CI:2.2% to 13.1%).
suggest that education about extra calories consumed from carbonated
beverages can result in decrease rates of obesity.
of harm is minimal.
of the study include: relatively low statistical power (n=29); randomization
was not concealed; and, randomization occurred by class, which may have
allowed transfer of the educational message outside of the classroom.