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Childhood Obesity Prevention:

What’s the evidence?

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What’s the evidence? Waters, E., de Silva-Sanigorski, A., Hall, B.J., Brown,

T., Campbell, K.J., Gao, Y., Armstrong, R., Prosser, L., & Summerbell, C.D. (2011). Interventions for preventing obesity in children. Cochrane Database of Systematic Reviews, 2011(12): Art. No.: CD001871

http://health-evidence.ca/articles/show/15329

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Welcome!

This webinar has been made possible with support from the Canadian Institutes of Health Research

Childhood Obesity Prevention:

What’s the evidence?

Maureen Dobbins Scientific Director Tel: 905 525-9140 ext 22481 E-mail: dobbinsm@mcmaster.ca

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Review Waters, E., de Silva-Sanigorski, A., Hall, B.J., Brown, T.,

Campbell, K.J., Gao, Y., Armstrong, R., Prosser, L., & Summerbell, C.D. (2011). Interventions for preventing obesity in children. Cochrane Database of Systematic Reviews, 2011(12): Art. No.: CD001871

Questions?

Summary Statement: Waters (2011) P 0-18 years I community, school, home, day care, preschool –

promoting healthy eating, physical activity, social support

C usual care O primary outcome – BMI

Quality Rating 9 (strong)

Overall Considerations Favorable impact observed for BMI: 6-12 years only physical activity/nutrition interventions combined in education setting alone of short or long duration Results consistent across research designs

General Implications Public health should promote/support/implement: strategies to prevent obesity among 6-12 year olds in education setting focused on healthy eating and physical activity of various durations

different strategies are needed for young children and

adolescents Long term impact remains unclear

What’s the evidence

Overall BMI -0.15 (95% CI -0.21, -0.09) 6-12 years -0.15 (95% CI -0.23, -0.08)

Not statistically significant 0-5 or 13-18

Overall Meta Analysis Results

Subgroup: 0-5 years

Overall Meta Analysis Results Subgroup: 6-12 years

Overall Meta Analysis Results

Subgroup: 13-18 years

Implications for practice and policy

Support obesity prevention in education settings Continue to investigate strategies for other age groups

Intervention Type Combined physical activity and nutrition interventions

-0.18 (95% CI -0.27, -0.09) Physical activity alone -0.11 (95% CI - -0.19,-0.02)

Nutrition alone (not significant)

Implications for practice and policy

Support interventions to change physical activity and healthy eating behaviours in 6-12 years

Environment and culture

Intervention Setting Education setting only -0.14 (95% CI -0.21, -0.08) Education + other settings, or non-ed settings only not

effective

Sig effect in non-education settings for <5 years

Implications for practice and policy

Curriculum development More physical activity sessions Nutritional quality of food Training and capacity development for teachers and staff Parents of young children

Intervention length Programs < than or > than 12 months have similar

positive effect

Implications for practice and policy

Tailor program length to needs of education setting

Research Designs Randomization not a factor

Innovative ideas for 0-5 and 13-18 need to be

developed and evaluated

Overall Considerations Favorable impact observed for BMI: 6-12 years only physical activity/nutrition interventions combined in education setting alone of short or long duration Results consistent across research designs

General Implications Public health should promote/support/implement: strategies to prevent obesity among 6-12 year olds in education setting focused on healthy eating and physical activity of various durations

different strategies are needed for young children and

adolescents Long term impact remains unclear

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