Nursing

PICO is a widely-used acronym to help students and practitioners remember the key question components needed to gather information that supports evidence-based practice. PICO questions may be composed as natural-language questions, or students may simply identify the keyword that matches each component. 

For a helpful worksheet to develop PICO questions: 

The Well-Built, Patient-Oriented Clinical Question

2013. "Evidence Based Practice, Step by Step." American Journal of Nursing, 110.3, 58-61. Retrieved from http://journals.lww.com/ajnonline/Fulltext/2010/03000/Evidence_Based_Practice,_Step_by_Step__Asking_the.28.aspx