Comparison 8. Physical activity interventions versus control: age 13‐18 years.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
8.1 zBMI ‐ setting	1	100	Mean Difference (IV, Random, 95% CI)	‐0.20 [‐0.30, ‐0.10]
8.1.1 School	1	100	Mean Difference (IV, Random, 95% CI)	‐0.20 [‐0.30, ‐0.10]
8.2 zBMI ‐ duration	1	100	Mean Difference (IV, Random, 95% CI)	‐0.20 [‐0.30, ‐0.10]
8.2.1 Duration of intervention ≤ 12 months	1	100	Mean Difference (IV, Random, 95% CI)	‐0.20 [‐0.30, ‐0.10]
8.3 BMI ‐ setting	4	720	Mean Difference (IV, Random, 95% CI)	‐1.53 [‐2.67, ‐0.39]
8.3.1 School	4	720	Mean Difference (IV, Random, 95% CI)	‐1.53 [‐2.67, ‐0.39]
8.4 BMI ‐ duration	4	720	Mean Difference (IV, Random, 95% CI)	‐1.53 [‐2.67, ‐0.39]
8.4.1 Duration of intervention ≤ 12 months	4	720	Mean Difference (IV, Random, 95% CI)	‐1.53 [‐2.67, ‐0.39]