Comparison 5. Non‐legislative interventions vs control (free helmets).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Observed helmet wearing	2	318	Odds Ratio (M‐H, Random, 95% CI)	4.35 [2.13, 8.89]
2 Self reported helmet ownership	3	556	Odds Ratio (M‐H, Random, 95% CI)	11.63 [2.14, 63.16]
3 Self reported helmet wearing	3	501	Odds Ratio (M‐H, Random, 95% CI)	7.27 [1.28, 41.44]