Summary

In this tutorial we have looked at:

	How different types of question require different types of study to answer them
	EBP means that we should look for the best available evidence to fit the needs of our question
	What types of study can provide best answers for questions about diagnosis, prognosis, harm, therapy, prevention, cost-effectiveness and quality of life
	The advantages and disadvantages of study types

Some people have taken this a step further to generate "Levels of Evidence". These levels show what type of study is preferred and how to rank lesser quality evidence in comparison. You can see an example on the Centre for Evidence-Based Medicine's website: www.cebm.net. This approach allows you to target your search more effectively.

We are now ready to move on to Step 2 of the EBP cycle: Finding the Evidence.