Table 1.

Research Questions

Subject	Research Questions
Formulating an AD	What are people's preferences at the end of their lives? What are reasons to formulate (or not formulate) an AD?
Having an AD	Do the preferences concerning a person's end of life change over time and does he/she modify his/her AD accordingly if they do? What are the expectations concerning ADs and end-of-life decision-making among people who have an AD and do they discuss this with their physician or others?
The Use of ADs	Are the directions in ADs followed at the end of life in the situations where they relate to? If they are followed, what are the reasons therefore? If they are not followed, how do they influence the end of life of the person in question? What is the role of physicians and family or close-ones in this process?