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Table 2 Subgroup analyses by characteristics of single-component interventions

From: A systematic review and meta-analysis of the overall effects of school-based obesity prevention interventions and effect differences by intervention components

Outcomes BMI BMI Z-score
N Mean difference, 95% CI P for subgroup analyses N Mean difference, 95% CI P for subgroup analyses
Characteristics of the PA component
1) PA’s frequency and duration
  ≥ 3/week and ≥ 10 min/time 5 −0.10 (− 0.22, 0.01) 0.16
  < 3/week or < 10 min/time 2 −0.31 (− 0.57, − 0.05)
2) Curricular PA
 Yes 3 −0.30 (− 0.51, − 0.10) 0.02
 No 4 −0.04 (− 0.17, 0.09)
3) PA emphasizing enjoyment
 Yes 5 −0.19 (− 0.33, − 0.05) 0.03
 No 2 −0.004 (− 0.10, 0.09)  
Topics of HE covering both energy intake and output
 Yes 3 −0.06 (− 0.26, 0.13) 5 − 0.07 (− 0.16, − 0.03)
 No 1 −0.40 (− 1.01, 0.21) 1 − 0.12 (− 0.28, 0.04)
  1. CI confidence interval, SP school policy, PA physical activity, HE health education, DI dietary improvement. “-” due to insufficient observations