Health and Quality of Life Outcomes BioMed Central Research Open Access Injection Drug Use Quality of Life scale (IDUQOL): A validation study Anita M Hubley*1, Lara B Russell1 and Anita Palepu2,3 Address: 1Measurement Evaluation and Research Methodology, Dept of ECPS, 2125 Main Mall, The University of British Columbia, Vancouver, BC, Canada, 2Division of Internal Medicine, Department of Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada and 3Centre for Health Outcome and Evaluation Sciences, St. Paul's Hospital, Vancouver, BC, Canada Email: Anita M Hubley* - ; Lara B Russell - brussell@; Anita Palepu - anita@ * Corresponding author Published: 19 July 2005 Health and Quality. | BioMed Central Health and Quality of Life Outcomes Research Open Access Injection Drug Use Quality of Life scale IDUQOL A validation study Anita M Hubley 1 Lara B Russell1 and Anita Palepu2 3 Address Measurement Evaluation and Research Methodology Dept of ECPS 2125 Main Mall The University of British Columbia Vancouver BC Canada 2Division of Internal Medicine Department of Medicine Faculty of Medicine University of British Columbia Vancouver BC Canada and 3Centre for Health Outcome and Evaluation Sciences St. Paul s Hospital Vancouver BC Canada Email Anita M Hubley - Lara B Russell - brussell@ Anita Palepu - anita@ Corresponding author Published 19 July 2005 Received 04 May 2005 Health and Quality ofLife Outcomes 2005 3 43 doi 1477-7525-3- Accepted 19 July 2005 43 This article is available from http content 3 1 43 2005 Hubley et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Existing measures of injection drug users quality of life have focused primarily on health and health-related factors. Clearly however quality of life among injection drug users is impacted by a range of unique cultural socioeconomic medical and geographic factors that must also be considered in any measure. The Injection Drug User Quality of Life IDUQOL scale was designed to capture the unique and individual circumstances that determine quality of life among injection drug users. The overall purpose of the present study was to examine the validity of inferences made from the IDUQOL by examining the a dimensionality b reliability of scores c criterion-related validity evidence and d both convergent and discriminant validity evidence. Methods An exploratory .
