Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Do visual analogue scale (VAS) derived standard gamble (SG) utilities agree with Health Utilities Index utilities? A comparison of patient and community preferences for health status in rheumatoid arthritis patients | BioMed Central Health and Quality of Life Outcomes Research Do visual analogue scale VAS derived standard gamble SG utilities agree with Health Utilities Index utilities A comparison of patient and community preferences for health status in rheumatoid arthritis patients Amir Adel Rashidi1 Aslam H Anis2 and Carlo A Marra 3 4 Open Access Address 1Centre for Clinical Epidemiology and Evaluation Faculty of Pharmaceutical Sciences University of British Columbia Canada 2MHA Program Department of Health Care and Epidemiology Faculty of Medicine University of British Columbia Canada 3Faculty of Pharmaceutical Sciences University of British Columbia Vancouver BC Canada and 4Centre for Clinical Epidemiology and Evaluation Vancouver Coastal Health Research Institute Vancouver BC Canada Email Amir Adel Rashidi - amiradel@ Aslam H Anis - Carlo A Marra - Corresponding author Published 20 April 2006 Received 26 July 2005 Health and Quality of Life Outcomes 2006 4 25 doi 1477-7525-4-25 Accepted 20 April 2006 This article is available from http content 4 1 25 2006 Rashidi 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 Assessment of Health Related Quality of Life HRQL has become increasingly important and various direct and indirect methods and instruments have been devised to measure it. In direct methods such as Visual Analog Scale VAS and Standard Gamble SG respondent both assesses and values health states therefore the final score reflects patient s preferences. In indirect methods such as multi-attribute health status classification systems the patient provides the assessment of a health state and then a multi-attribute utility .