Williams 1988.

Methods	RCT (C) Allocation at level of prenatal classes
Participants	Pregnant women attending prenatal classes
Interventions	I = 1 hour lecture, handouts on burn prevention, usual safety education. C = usual safety education.
Outcomes	Outcomes measured at 1 month: Safe hot water temperature (not defined) Possession of smoke alarm Functional smoke alarm ‐ no significant difference in alarm ownership between groups. Figures and P values not reported
Notes	Blinding ‐ n Outcomes 80% ‐ u Balance ‐ n/a
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	Unclear