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School diet-and-activity programs did not significantly change BMI-for-age overall

BMC public health (PubMed)Aug 29, 2026

AI-summarized from the linked source. Educational brief, not medical advice.

Brief summary

A systematic review of school-based programs in Africa found modest improvements in some weight-related outcomes, but the pooled effect on BMI-for-age was not statistically significant.

What NurseJet pulled from the source

Eleven studies met inclusion criteria, and nine intervention comparisons contributed to the BMI-for-age meta-analysis. Most programs combined physical activity with nutrition or other behavioral components. The pooled mean difference was 0.03 (95% CI -0.24 to 0.29; p = .813; I² = 69%), so the review did not establish an overall BMI-for-age benefit.

Why this matters for nurses

School and pediatric nurses often reinforce nutrition and activity programs and help families interpret growth trends. The review supports cautious expectations: multicomponent programs may help selected outcomes, but current African evidence does not show a consistent pooled change in BMI-for-age.

Bedside takeaway

Set realistic expectations: school diet-and-activity programs may help some outcomes, but pooled BMI-for-age did not significantly change.

How This Applies in Practice

Use this when: Supporting a child or adolescent enrolled in a school-based nutrition and physical-activity program.

On your shift

  • Reinforce the program's approved nutrition and activity messages in language the student and family understand.
  • Document participation, relevant growth measures, and barriers to carrying the plan into daily routines.
  • Escalate concerning growth patterns or health symptoms for individualized pediatric assessment rather than assuming the group program is sufficient.
Keep in mind: The pooled BMI-for-age result was not significant and the evidence was geographically concentrated. Follow the school or clinic protocol, facility policy, and provider plan.

Key takeaways

  • The review included 11 studies, mostly from South Africa and mostly using quasi-experimental designs.
  • Most interventions were multicomponent and delivered in primary-school group settings.
  • Some studies reported modest adiposity improvements or maintenance of normal weight status.
  • Across nine comparisons, the pooled effect on BMI-for-age was not statistically significant and heterogeneity was substantial.

Practice implications

  • Use the approved school or clinic health-promotion program, document participation and relevant growth measures, and explain that healthy routines have value even when a short-term BMI change is not guaranteed. Escalate individual growth or health concerns through the pediatric care pathway.

Limitations & cautions

  • Only 11 studies were included; 72.7% were conducted in South Africa and 70% were quasi-experimental. The pooled analysis was heterogeneous, and the findings may not generalize across African regions, school systems, or individual children.
  • AI-summarized from the linked source. Review the original article before applying to practice.

Citations

Exact source links

Public citations are filtered to exact credible source pages. Homepage-only or invalid links stay in admin review and are not shown here.

BMC public health (PubMed)

BMC public health (PubMed). School-based diet and physical activity interventions and weight-related outcomes among children and adolescents in Africa: a systematic review and meta-analysis.

Open original source

https://pubmed.ncbi.nlm.nih.gov/42668382/

Professional education only

This summary does not replace clinical judgment, facility policy, provider orders, or official guidelines. Verify practice changes against the original source and local protocol.

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