Figure 4From: Structuring and validating a cost-effectiveness model of primary asthma prevention amongst children The PREVASC Decision Tree. Structure of the decision analytic model to assess the cost-effectiveness of primary prevention of asthma. The tree compares current situation without primary prevention with the alternative of primary prevention of asthma amongst children (first decision node) as well as whether multifaceted or unifaceted primary prevention approaches is more cost-effective (second decision node).Back to article page