The two other interventions known as the 'Intervention
centred on adolescents' physical activity and sedentary
behaviour (ICAPS)' and the 'Wessex Healthy schools
Award' were evaluated in secondary school children by
Simon et al. [29,44] and Moon et al. [39]. Both programmes
combined a health educational program and
changes in four environmental components. The intervention
of Simon et al. targeted physical activity while the
study of Moon et al. targeted physical activity, diet and
smoking. Although both studies consisted of the same
intervention components, the content of these components,
the methodological quality rating of the trials and
the impact on the level of physical activity of the teenagers
differed a lot. The target population of the multilevel
ICAPS intervention were students of middle schools in
Eastern France. After the first six months the proportion of
teenagers engaged in out-of-school organised physical
activity increased from 64% to 83% whereas it was
unchanged among the control students (p < 0.01). Since
ICAPS was designed to take place over 4 academic years,
the evaluation of the long-term effectiveness should provide
us with more information in the future. In contrast,
the study from Moon et al. [39], the 'Wessex Healthy
Schools Award', that targeted three health behaviours,
produced no significant changes in the physical activity
level of teenagers. The study by Simon et al. [29] was rated
as moderate, while the study of Moon et al. [39] was rated
as weak. Although both studies were given a low rating on
blinding in the quality assessment, this was the only item
for the study of Simon et al. that received a low rating. The
study of Moon et al. failed also on the items "confounders"
and "data collection methods" due to incomplete
description of these items in the published manuscripts.