We rated quality, prioritising higher-quality studies. We separated results by intervention
type and agitation level. As we were unable to meta-analyse results except for light therapy, we present a
qualitative evidence synthesis. In addition, we calculated standardised effect sizes (SESs) with available
data, to compare heterogeneous interventions. In the health economic analysis, we reviewed economic
studies, calculated the cost of effective interventions from the effectiveness review, calculated the
incremental cost per unit improvement in agitation, used data from a cohort study to evaluate the
relationship between health and social care costs and health-related quality of life (DEMQOL-Proxy-U
scores) and developed a new cost-effectiveness model.