|The health state descriptive system (questionnaire)
|Properties of the health state descriptive system
|Replacing missing data
|Valuation system
|Properties of the valuation system
|Use of 15D
|Use as a profile instrument
|How to obtain 15D
|Diseases / conditions / health problems studied
|16D and 17D
|15D User's registration form

Welcome to the homepage of the 15D©
The health-related quality of life (HRQoL) instrument

This website provides information of the 15D, its properties and usage.
The 15D is a generic, comprehensive (15-dimensional), self-administered instrument for measuring HRQoL among adults (age 16+ years). It combines the advantages of a profile and a preference-based, single index measure. A set of utility or preference weights is used to generate the 15D score (single index number) on a 0-1 scale. In most of the important properties the 15D compares favourably with other preference-based generic instruments.
Based on the 15D, a version has also been developed for adolescents aged 12-15 years (16D) and for children aged 8-11 (17D).
Copyright: 15D©/Harri Sintonen (www.15D-instrument.net)
News on electronic versions

An electronic, internet-based tools for collecting the 15D/16D/17D data, calculating the 15D/16D/17D scores and dimension level values on a 0-1 scale, drawing graphical 15D/16D/17D profiles and making comparisons to age- and gender-standardised general population scores are available. The tools are commercial products. For demo of the 15D, click http://demo.hoidonvaikuttavuus.fi, for further information and acquision inquiries (including pricing policy), please contact mia.laitinen@corame.fi, phone +358 400 673701.

News on the minimum important change in the 15D scores

In a just accepted article  (Qual Life Res) it was estimated that the minimum important change in the 15D scores is 0.015. For more details, see "Properties of the valuation system" and http://www.ncbi.nlm.nih.gov/pubmed/25145637.

Author: Terraventum