What is the evidence for its reliability, validity and responsiveness?
In a multi-site Canadian sample the internal consistency reliability of the EDQLS was found to be .96, and construct validity was strongly supported across several comparator instruments. In 3 and 6 month follow-up, the EDQLS has been shown to have very good responsiveness across multiple indicators and in comparison with well-validated generic instruments. Peer-reviewed articles on its development and validation are available from the authors, at the website. The main peer-reviewed publication that describes the development and validation of the instrument can be found at http://www.hqlo.com/content/5/1/23.
