how to transform my results in the EuroQOL EQ-5D + EQ VAS to get an overall score that can be presented as “good, moderate, poor“ quality of life?
https://euroqol.org/eq-5d-instruments/eq-5d-3l-available-modes-of-administration/
we will use it pre and post bariatric surgery research and it is not the main topic so we would like a short and easy to use questionnaire that is easy to calculate and easy to present
You could take the normative values or the VAS by 33.3 each. But it is imperfect as the scale is skewed depending and results depend on how you sample your population....
The questionnaire is accessible to all parties involved in a study. The score obtained does not allow you to stratify into low, moderate or high. You get an overall Index, the visual analogue scale score. It is very useful for quality of life, age-adjusted quality of life and cost-effectiveness studies. It is a generic instrument that can be adapted to different types of studies and populations. In the attached document you can get more information, its guide is very complete. I hope I have helped you.
EoQ5D is a prescribed structure, we cannot manipulate it. None will accept. In UK some health economics experts are discussed on " we needs to change EoQ5D as with time with transition of disease the method needs to modify", Professor Ric Fordham,UK is one of them.
As answer above use "Visual Analog Scale" if you wants to said QALY.
Additionally, can think about;
Likert scale:
It's a question that uses a 5 or 7-point scale. Typically, the Likert survey question includes a moderate or neutral option in its scale.
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