Barone 1988.

Methods	Cluster randomised controlled trial. Allocation by coin toss within paired classes. Outcomes assessment not blinded.
Participants	5 parenting classes (108 parents of toddlers).
Interventions	I: Slides, handouts on burn prevention; motor vehicle safety education and video; bath water thermometer; hot water gauge. C: Usual safety education.
Outcomes	Home inspection 6 months after class: 1) Final alarm ownership. 2) Final functioning alarms.
Notes	27% of parents attending randomly allocated classes did not enrol in trial.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	High risk	C ‐ Inadequate