Blake 1993.

Methods	Non‐RCT/CBA
Participants	Parents in two inner city health clinics
Interventions	I = educational video C = no video
Outcomes	Period over which outcomes measured not reported. Functional smoke alarm. Significant increase in purchase and installation of smoke alarms in intervention group No figures or P values reported
Notes	Blinding ‐ u Outcomes 80% ‐ n Balance ‐ u Allocation of participants not described
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	Not applicable ‐ non‐randomised study