This paper reports some of the findings from a large-scale (N = 4970) longi
tudinal study evaluating the efficacy of two types of school-based interven
tion designed to discourage cigarette smoking in children between ages of n
ine and thirteen. The interventions were in the form of a Theatre in Health
Education (THE) programme. and a school smoking policy which involved chan
ges in adult behaviour. The research adopted a quasi-experimental design, f
ollowing children from primary to secondary education where necessary over
a period of two and a half years. Five waves of questionnaire data were col
lected with biochemical markers in the form of saliva samples which served
as a ''bogus pipeline". Though absolute levels of smoking were low, the fin
dings indicate a weak positive effect over the longer term of both interven
tions on smoking behaviour (past and current) for girls but no such effect
for boys. Conversely, then was no impact for girls on a measure of intentio
n to smoke, although a small long term effect was found for buys in the The
atre in Health Education intervention group; Effects of the interventions o
n targeted psychological variables were also minor: Possible reasons for th
ese effects are discussed.