Exploring the origin and conceptual framework of the EQ VAS.

ABSTRACT:

Purpose

The objective of this paper is to report on the origin of the EQ VAS and current understanding of the EQ VAS conceptual framework via a literature search based on the snowball approach.

Methods

A review was conducted in two steps: (1) a citation search and (2) a search of the EuroQol group's grey literature.

Results

The findings indicate that the EQ VAS was originally designed as a warm-up task for valuing hypothetical health states. The characters of the EQ VAS reflect its valuation origin, such as drawing a line (the previous version), vertical orientation, and choice of end labels. None of these design elements of the EQ VAS were chosen for the purpose of measuring self-reported overall health. Despite this, the EQ VAS proves to be a valid self-reported hea

SUBMITTER: Chuang LH 

PROVIDER: S-EPMC12274267 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature