Topic explainerPEO framework / nursing research

Study resource

PEO framework in nursing research

Use PEO to turn a broad nursing, health or social-care topic into a focused qualitative research question.

nursingresearchliterature review

PEO framework

Population, Exposure, Outcome

PEO can help focus qualitative or exploratory questions about experiences, exposures and outcomes in health and social-care research.

P

Population

Who is the nursing, health or social-care group?

E

Exposure

What experience, situation, condition or context matters?

O

Outcome

What experience, effect or result do you need to explore?

Core concepts

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.

Academic perspectives and points to compare

Perspective 1

Define the population or group clearly before choosing keywords.

Perspective 2

Identify the exposure, experience or issue being explored.

Perspective 3

Use outcomes to shape search terms and decide what evidence is relevant.

What to focus on in your reading

Use this when you need to turn a broad nursing, health or social-care topic into 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.

The full guide explains each part of PEO and shows how the framework connects to search terms and evidence planning.

From PEO to a literature search

Translate each PEO element into search concepts, list synonyms and subject headings, then combine the concepts using the Boolean logic required by the database.

Search results should be judged against the question and eligibility criteria rather than selected because the title happens to contain the same wording.

Points to watch

  • 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.