Ann Intern Med -- Boulware et al. 146 (4): 289 Figure 2

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Figure 2. Summary of literature search and review process (number of articles).

*Total may exceed 1284; several reasons for exclusion at the abstract level were allowed. ${dagger}$ A total of 50 articles were included in the data abstraction. These 50 articles represented 33 studies that reported multiple outcomes and multiple follow-ups. ${ddagger}$ Total may exceed 769; several reasons for exclusion at the article inclusion/exclusion review level were allowed. CINAHL = Cumulative Index of Nursing and Alliance Health Literature; PHE = periodic health evaluation.