Evidence-Based Practice vs Research: What's the Difference?

This distinction trips up more nursing students than almost any other methodological question — and committees notice quickly when a project is framed as the wrong one. Here's the actual difference, and why it matters for how your project needs to be structured.

The core distinction

Research generates new, generalizable knowledge — it asks a question nobody has definitively answered, using a methodology designed to produce results that apply beyond your specific setting. It typically requires full IRB review as human-subjects research.

Evidence-based practice (EBP) takes knowledge that already exists (from research, clinical expertise, and patient values) and applies it to change practice in a specific setting. It doesn't aim to generalize — it aims to improve outcomes for your unit, your patients, right now.

A related but distinct category: quality improvement

Quality improvement (QI) is closely related to EBP but has its own emphasis: using data cycles (like Plan-Do-Study-Act) to improve a specific process or outcome, often without necessarily applying an external evidence base the way a formal EBP project does. Many DNP projects blend elements of both EBP and QI — which is exactly why the label matters: it determines what your methods section needs to include.

Why this determines your IRB pathway

This is the practical reason the distinction matters: research involving human subjects generally requires full IRB review, while EBP and QI projects are often eligible for an IRB exemption or non-human-subjects-research determination — but only if the project is actually designed and executed as EBP/QI, not research wearing an EBP label. Misclassifying your project can mean a compliance problem discovered late, not just a wording issue.

How to tell which one you're doing

• If your goal is "does X work, in general?" — that's research.
• If your goal is "does implementing X, which the evidence already supports, improve outcomes here?" — that's EBP.
• If in doubt, ask your program early, and get an explicit IRB determination in writing rather than assuming.