Evidence-Based Practice Foundations
What this domain tests
The EBP-EAP foundations domain checks whether you can define evidence-based practice precisely, distinguish it from adjacent activities, and apply its steps and models to clinical decisions. Expect items on the three-part definition, the EBP process, levels of evidence, and barriers.
Core rules
- EBP is the conscientious, explicit, and judicious use of current best evidence combined with clinical expertise and patient values and preferences. It is not “cookbook” care and not synonymous with research utilization or quality improvement.
- The classic EBP steps are: ask a focused question; acquire the best evidence; appraise it; apply it with patient context; assess the outcome. Many models add “cultivate a spirit of inquiry” as step 0.
- Common models: Iowa Model (triggers, pilot, implementation), Johns Hopkins Nursing EBP Model (practice question, evidence, translation), ACE Star Model (knowledge transformation), and PARIHS (evidence, context, facilitation).
- Evidence hierarchies rank study designs for questions of effectiveness, but the best evidence depends on the question. For prognosis, a cohort study may outrank an underpowered RCT; qualitative questions use different hierarchies.
- Barriers include lack of EBP skills, limited access, organizational culture, clinician resistance, and misaligned incentives, not only lack of time.
Worked example
A unit wants to reduce catheter-associated urinary tract infections. A nurse proposes a new catheter-securing device because “a study showed it works.” Is this EBP? A single study is not the whole of EBP. The team should frame a PICO question, search for a systematic review or guideline, appraise validity and applicability, consider local infection rates, workflow, patient comfort, and cost, then pilot with measurement. The decision is EBP only when evidence, expertise, and patient context are integrated and outcomes are evaluated.
Traps that cost marks
- Equating EBP with doing research or with QI.
- Treating the evidence hierarchy as absolute across all question types.
- Forgetting patient values and preferences; the three-part definition is heavily tested.
- Citing a model without naming its steps or purpose.