Lacoutre 1978.

Methods	CBA (C) Allocation at level of towns
Participants	School children aged 6‐14 years in Wilmington (intervention) and Scituate (control), Massachusetts
Interventions	I = community poison prevention education programme, directed at school children C = no community poison prevention education programme
Outcomes	Period over which outcomes measured not reported. Possession of ipecac ‐ reports change in percentage of families having ipecac but does not report baseline prevalence. Significantly more intervention group families had ipecac than control group families, P < 0.05.
Notes	Blinding ‐ n Outcomes 80% ‐ u Balance ‐ y
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	Not applicable ‐ non‐randomised study