Zhao 2005.

Methods	RCT
Participants	Children aged 7‐13 years attending 4 primary schools
Interventions	I = safety education provided to parents and children C = usual care
Outcomes	Outcomes measured at 1 and 2 years: Self reported injuries (unclear if children reported multiple injuries) Self reported all injuries combined 1 year after intervention I=262/3172 C=234/2699; not significant (p value not given) Self reported all injuries combined 2 years after intervention I=211/3226  C=229/2654, χ2 =9.26, p<0.01 Self reported falls 1 year after intervention I=90/3172 C=67/2699; not significant (p value not given) Self reported falls 2 years after intervention I=64/3226 C=75/2654, p<0.05 Self reported scalds/burns 1 year after intervention I=28/3172 C=25/2699; not significant (p value not given) Self reported scalds/burns 2 years after intervention I=10/3226 C=18/2654, p<0.05 Self reported poisoning 1 year after intervention I=6/3172 C=8/2669; not significant (p value not given) Self reported poisoning 2 years after intervention I=4/3226 C=11/2654, p<0.05 Self reported electrical injury 1 year after intervention I=11/3172 C=10/2699; not significant (p value not given) Self reported electrical injury 2 years after intervention I=2/3226 C=6/2654; not significant (p value not given) Self reported inhalation injury 1 year after intervention I=10/3172 C=9/2699; not significant (p value not given) Self reported inhalation injury 2 years after intervention I=8/3226 C=5/2654; not significant (p value not given) Self reported cuts 1 year after intervention I=12/3172 C=11/2699; not significant (p value not given) Self reported cuts 2 years after intervention I=20/3226 C=9/2654; not significant (p value not given) Self reported other injuries 1 year after intervention I=1/3172 C=6/2699; not significant (p value not given) Self reported other injuries 2 years after intervention I=5/3226 C=6/2654; not significant (p value not given)
Notes	Blinding ‐ u Outcomes 80% ‐ y Balance ‐ n/a
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	Unclear

(C) = clustered allocation
 Numerators and denominators only presented for outcomes not included in meta analyses.
 Blinding: y = yes, n = no, u = unclear
 Outcomes measured on 80% (Outcomes 80%) of participants in each arm: y = yes, n = no, u = unclear
 Treatment arms balanced for confounding (Balance): y = yes, n = no, u = unclear, n/a = not applicable