= P =

Author(s)

Permuted index

The Permuted index is an alphabetical list of all entry terms of a thesaurus. The entry term sends to the retained term (Subject Heading).

PICO is useful for medical questions and for topics where one thing is being compared with another.

Patient :.	This is the “Who”. For this you need to think of age, sex, ethnic origins or other defining characteristics of the patient and the population
Intervention :	This is also sometimes known as exposure, and makes up the “What”. This is what is happening to the patient or population, so it could be a drug or a therapy, a screening questionnaire or a health improvement programme.
Comparison :	With what is the intervention (or indeed population) being compared? This could be a control group.
Outcome :	What outcome do you expect to see? For example, you may be interested in knowing whether an intervention has a health benefit, or whether an exposure results in mortality.

Source : NHS FIFE LIBRARY SERVICES: Guide to Literature Searching. Available from: http://www.nhsfifelibraries.scot.nhs.uk/publications/litsearching.doc

PICO-Timeframe :	This refers to one or more time-related variables such as the length of time the treatment should be prescribed or the point at which the outcome is measured.
PICOT-T	Type of study design
PICO-Context:
PICO-Setting:

Source:

Precision is the proportion of retrieved articles that are of high quality