Fig. 1From: Retention in RCTs of physical rehabilitation for adults with frailty: a systematic review and meta-analysisPreferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) Diagram. Legend: Flow diagram of included studies. We utilized a two-stage search approach, first searching for published systematic reviews of RCTs (left hand side of the diagram), and second searching for primary RCTs (right hand side of the diagram). For systematic reviews that met inclusion, we hand-searched each review to identify the included RCTs. We combined these RCTs at the full-text reviewBack to article page