Resource guide
PEO framework in nursing research
Use PEO to turn a broad nursing, health or social-care topic into a focused qualitative research question.
PEO visual
Population, Exposure, Outcome
Use each part to turn a broad idea into a focused qualitative or exploratory research question.
Population
Who is the nursing, health or social-care group?
Exposure
What experience, situation, condition or context matters?
Outcome
What experience, effect or result do you need to explore?
Quick answer
PEO stands for Population, Exposure and Outcome. It helps you define who or what you are studying, the situation or experience involved, and the outcome or effect you want to explore.
Use this when
Use this when you need to turn a broad nursing, health or social-care topic into a focused qualitative research question.
PEO is best for qualitative or exploratory nursing and health questions where you need to understand experiences, perceptions, exposure to a situation or the effect of a condition in context.
What this helps with
Frame a nursing, health or social-care topic as a focused qualitative research question.
Search for PEO nursing examples, literature-review questions, qualitative research topics and related resource summaries. If there is no close match, use the request route to ask for a reviewed resource pack or similar brief.
Framework and structure
Step 1
Define the population or group clearly before choosing keywords.
Step 2
Identify the exposure, experience or issue being explored.
Step 3
Use outcomes to shape search terms and decide what evidence is relevant.
From PEO to Library search
Start with the framework, then search broader Library terms rather than waiting for an exact PEO sample. Useful searches include nursing, research and literature review.
If the Library does not have a close sample yet, use Research Builder to shape your own question before asking for support with a resource guide or similar brief.
Common mistakes
- Using PEO and PICO interchangeably without explaining why.
- Making the outcome so broad that the search becomes unfocused.
- Skipping synonym planning before building a search strategy.