Focus the question so that it is answerable, determines the objective of the literature search, and informs the tools used for appraisal. Questions can generally be structured in terms of a relationship among the patient (P), an intervention (I), sometimes a comparison intervention (C), and one or more specific outcomes of interest (O).
Flemming K. Asking answerable questions [editorial].Evidence-Based Nursing 1998 Apr;1:36-7.
Richardson W, et al. The well-built clinical question: a key to evidence-based decisions.
ACP Journal Club 1995 Nov- Dec;123(3):A12-3.
Appraising the evidence / Sage Publications
CASE Worksheet / JMLA (revised worksheet)
Critical Appraisal of Evidence / KT Clearinghouse
Evidence-based Medicine Toolbox / Knowledge Translation
Critical appraisal worksheets / (Centre for Evidence-Based Medicine)
Critical appraisal worksheets / (Duke Univ.)
Essentials of nursing research [electronic resource] : appraising evidence for nursing practice / Denise F. Polit, Cheryl Tatano Beck
Polit, Denise F.