An evidence-based practice model is a structured framework that guides nurses from a clinical question to a sustained practice change. The most used are the Iowa Model (trigger-driven, organizational change), the Johns Hopkins EBP Model (PET: Practice question, Evidence, Translation), the Stetler Model (individual practitioner research utilization), i-PARIHS (implementation success = facilitation of innovation, recipients, and context), ARCC (EBP mentors for system culture), and Rosswurm & Larrabee (moving from evidence to practice in six steps). Choose based on your scope: a unit team project fits Johns Hopkins or Iowa; system-wide culture change fits ARCC; implementation science studies fit i-PARIHS.
EBP model decision matrix
| Model | Structure | Best for | Strength | Limitation |
|---|---|---|---|---|
| Iowa Model (revised 2017) | Trigger → priority → team → evidence → pilot → integrate | Organizational, problem- or knowledge-focused triggers | Explicit decision points; pilot step | Less guidance on evidence appraisal |
| Johns Hopkins (JHEBP, 5th ed.) | PET: Practice question, Evidence, Translation | Unit teams, DNP projects, students | Ready-made appraisal tools and forms | Linear; context factors less detailed |
| Stetler Model | Preparation, validation, comparative evaluation, application, evaluation | Individual clinicians, CNS-led change | Critical thinking about applicability | Practitioner-focused, less team structure |
| i-PARIHS | Success = Facilitation × (Innovation, Recipients, Context) | Implementation science research | Rich context and facilitation constructs | Abstract; harder for novices to operationalize |
| ARCC | Assess culture → identify barriers/strengths → EBP mentors → implement → evaluate | System-wide EBP culture | Validated scales (EBP Beliefs, Implementation) | Requires trained mentors and resources |
| Rosswurm & Larrabee | Six steps: assess need, link, synthesize, design, implement, integrate | Clinicians new to EBP | Simple, links problem to standardized language | Older; fewer current tools |
How to choose the right EBP model
- Scope: single unit → Johns Hopkins or Iowa; whole system → ARCC.
- Purpose: translating evidence → Iowa/JHEBP; studying implementation itself → i-PARIHS.
- Team experience: novices benefit from JHEBP's tools; experienced teams can use i-PARIHS.
- Organizational fit: use the model your hospital's Magnet or EBP council already uses — it eases approval.
- Pair with an implementation framework (e.g., CFIR, RE-AIM) for evaluation if your project requires it.
Clinical example 1: Sepsis bundle compliance with the Iowa Model
Trigger: problem-focused — SEP-1 compliance at 52%. Priority: yes, aligns with organizational quality goals. Team: ED nurses, intensivist, pharmacist, quality analyst. Evidence: Surviving Sepsis Campaign guidelines plus studies on nurse-driven screening. Pilot: nurse-initiated sepsis screening and lactate order set on one ED pod for 8 weeks. Evaluate: time-to-antibiotics and bundle compliance. Integrate: roll out ED-wide with EHR best-practice alert.
Clinical example 2: CAUTI reduction with Johns Hopkins PET
Practice question (PICOT): In adult med-surg inpatients with indwelling catheters (P), does a nurse-driven catheter removal protocol (I) compared with physician-order removal (C) reduce CAUTI rates (O) over 3 months (T)? Evidence: appraise with JHEBP Research and Non-Research Evidence Appraisal Tools; synthesize to "good and consistent" evidence. Translation: action plan, staff education, protocol launch, track catheter days and CAUTI per 1,000 catheter days, disseminate via poster.
Universal EBP translation checklist
- Problem quantified with baseline data
- PICOT question written and approved by stakeholders
- Systematic search documented (databases, terms, dates)
- Evidence appraised for level and quality with a named tool
- Recommendation and feasibility assessed
- Implementation plan with timeline, champions, and barriers addressed
- Outcome, process, and balancing measures defined
- Sustainability plan and dissemination route
Frequently Asked Questions
Sources & Further Reading
- Iowa Model of Evidence-Based Practice: Revisions and Validation. Iowa Model Collaborative. Worldviews on Evidence-Based Nursing, 14(3), 175–182, 2017.
- Johns Hopkins Evidence-Based Practice for Nurses and Healthcare Professionals. Dang, D., et al. (5th ed.). Sigma, 2025.
- A Guide to Implementation in Practice: i-PARIHS. Harvey, G., & Kitson, A. Routledge, 2015.
- The ARCC Model. Melnyk, B. M., & Fineout-Overholt, E. Evidence-Based Practice in Nursing & Healthcare, 2023.